Patents by Inventor Goran MAJKIC
Goran MAJKIC has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11923105Abstract: An MOCVD system fabricates high quality superconductor tapes with variable thicknesses. The MOCVD system can include a gas flow chamber between two parallel channels in a housing. A substrate tape is heated and then passed through the MOCVD housing such that the gas flow is perpendicular to the tape's surface. Precursors are injected into the gas flow for deposition on the substrate tape. In this way, superconductor tapes can be fabricated with variable thicknesses, uniform precursor deposition, and high critical current densities.Type: GrantFiled: August 15, 2022Date of Patent: March 5, 2024Assignee: University of Houston SystemInventors: Goran Majkic, Venkat Selvamanickam
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Patent number: 11901097Abstract: A round superconductor wire and method for fabricating same are disclosed. Embodiments are directed to a round superconductor wire including at least two superconductor tapes wound on a wire former. Each superconductor tape includes: bottom stabilizer and silver layers; substrate disposed above the bottom silver layer; buffer film stack disposed above the substrate; superconductor film disposed above the buffer film stack; top silver layer disposed above the superconductor film; and top stabilizer layer disposed above the top silver layer. At least one of the bottom stabilizer layer, bottom silver layer, substrate, buffer film stack, superconductor film, top silver layer, or top stabilizer layer is of a different width, thickness, or material composition in one of the superconductor tapes than in another of the superconductor tapes. These and other embodiments achieve a round superconductor wire having improved current density in high magnetic field applications when made in small diameters.Type: GrantFiled: October 28, 2019Date of Patent: February 13, 2024Assignees: University of Houston System, AMPEERS LLCInventors: Goran Majkic, Anis Ben Yahia, Wenbo Luo, Venkat Selvamanickam, Soumen Kar
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Publication number: 20230384356Abstract: A method and system for quench detection in high temperature superconductors, such as REBCO (rare-earth barium copper oxide), before thermal runaway. A REBCO superconducting tape is excited as a transmission line forming standing waves. A quench may then be detected in response to detecting a disturbance of the standing waves. In this manner, quench in high temperature superconductors, such as REBCO, is rapidly detected before thermal runaway.Type: ApplicationFiled: April 29, 2023Publication date: November 30, 2023Applicant: University of Houston SystemInventors: Goran Majkic, Venkat Selvamanickam, Jarek Wosik
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Publication number: 20220406985Abstract: A superconductor tape and method for manufacturing, measuring, monitoring, and controlling same are disclosed. Embodiments are directed to a superconductor tape which includes a superconductor film overlying a buffer layer which overlies a substrate. In one embodiment, the superconductor film is defined as having a c-axis lattice constant higher than 11.74 Angstroms. In another embodiment, the superconductor film comprises BaMO3, where M=Zr, Sn, Ta, Nb, Hf, or Ce, and which has a (101) peak of BaMO3 elongated along an axis that is between 60° to 90° from an axis of the (001) peaks of the superconductor film. These and other embodiments achieve well-aligned nanocolumnar defects and thus a high lift factor, which can result in superior critical current performance of the tape in, for example, high magnetic fields.Type: ApplicationFiled: July 15, 2022Publication date: December 22, 2022Inventors: Goran Majkic, Venkat Selvamanickam
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Publication number: 20220406986Abstract: A superconductor tape and method for manufacturing, measuring, monitoring, and controlling same are disclosed. Embodiments are directed to a superconductor tape which includes a superconductor film overlying a buffer layer which overlies a substrate. In one embodiment, the superconductor film is defined as having a c-axis lattice constant higher than 11.74 Angstroms. In another embodiment, the superconductor film comprises BaMO3, where M=Zr, Sn, Ta, Nb, Hf, or Ce, and which has a (101) peak of BaMO3 elongated along an axis that is between 60° to 90° from an axis of the (001) peaks of the superconductor film. These and other embodiments achieve well-aligned nanocolumnar defects and thus a high lift factor, which can result in superior critical current performance of the tape in, for example, high magnetic fields.Type: ApplicationFiled: July 15, 2022Publication date: December 22, 2022Inventors: Goran Majkic, Venkat Selvamanickam
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Publication number: 20220392669Abstract: An MOCVD system fabricates high quality superconductor tapes with variable thicknesses. The MOCVD system can include a gas flow chamber between two parallel channels in a housing. A substrate tape is heated and then passed through the MOCVD housing such that the gas flow is perpendicular to the tape's surface. Precursors are injected into the gas flow for deposition on the substrate tape. In this way, superconductor tapes can be fabricated with variable thicknesses, uniform precursor deposition, and high critical current densities.Type: ApplicationFiled: August 15, 2022Publication date: December 8, 2022Inventors: Goran Majkic, Venkat Selvamanickam
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Patent number: 11417444Abstract: An MOCVD system fabricates high quality superconductor tapes with variable thicknesses. The MOCVD system can include a gas flow chamber between two parallel channels in a housing. A substrate tape is heated and then passed through the MOCVD housing such that the gas flow is perpendicular to the tape's surface. Precursors are injected into the gas flow for deposition on the substrate tape. In this way, superconductor tapes can be fabricated with variable thicknesses, uniform precursor deposition, and high critical current densities.Type: GrantFiled: July 16, 2020Date of Patent: August 16, 2022Assignee: University of Houston SystemInventors: Goran Majkic, Venkat Selvamanickam
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Patent number: 11410797Abstract: An MOCVD system fabricates high quality superconductor tapes with variable thicknesses. The MOCVD system can include a gas flow chamber between two parallel channels in a housing. A substrate tape is heated and then passed through the MOCVD housing such that the gas flow is perpendicular to the tape's surface. Precursors are injected into the gas flow for deposition on the substrate tape. In this way, superconductor tapes can be fabricated with variable thicknesses, uniform precursor deposition, and high critical current densities.Type: GrantFiled: December 26, 2019Date of Patent: August 9, 2022Assignee: University of Houston SystemInventors: Goran Majkic, Venkat Selvamanickam
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Patent number: 11393970Abstract: A superconductor tape and method for manufacturing, measuring, monitoring, and controlling same are disclosed. Embodiments are directed to a superconductor tape which includes a superconductor film overlying a buffer layer which overlies a substrate. In one embodiment, the superconductor film is defined as having a c-axis lattice constant higher than 11.74 Angstroms. In another embodiment, the superconductor film comprises BaMO3, where M=Zr, Sn, Ta, Nb, Hf, or Ce, and which has a (101) peak of BaMO3 elongated along an axis that is between 60° to 90° from an axis of the (001) peaks of the superconductor film. These and other embodiments achieve well-aligned nanocolumnar defects and thus a high lift factor, which can result in superior critical current performance of the tape in, for example, high magnetic fields.Type: GrantFiled: August 29, 2017Date of Patent: July 19, 2022Assignee: University of Houston SystemInventors: Goran Majkic, Venkat Selvamanickam
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Publication number: 20210358660Abstract: A round superconductor wire and method for fabricating same are disclosed. Embodiments are directed to a round superconductor wire including at least two superconductor tapes wound on a wire former. Each superconductor tape includes: bottom stabilizer and silver layers; substrate disposed above the bottom silver layer; buffer film stack disposed above the substrate; superconductor film disposed above the buffer film stack; top silver layer disposed above the superconductor film; and top stabilizer layer disposed above the top silver layer. At least one of the bottom stabilizer layer, bottom silver layer, substrate, buffer film stack, superconductor film, top silver layer, or top stabilizer layer is of a different width, thickness, or material composition in one of the superconductor tapes than in another of the superconductor tapes. These and other embodiments achieve a round superconductor wire having improved current density in high magnetic field applications when made in small diameters.Type: ApplicationFiled: October 28, 2019Publication date: November 18, 2021Inventors: Goran Majkic, Anis Ben Yahia, Wenbo Luo, Venkat Selvamanickam, Soumen Kar
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Publication number: 20200350100Abstract: An MOCVD system fabricates high quality superconductor tapes with variable thicknesses. The MOCVD system can include a gas flow chamber between two parallel channels in a housing. A substrate tape is heated and then passed through the MOCVD housing such that the gas flow is perpendicular to the tape's surface. Precursors are injected into the gas flow for deposition on the substrate tape. In this way, superconductor tapes can be fabricated with variable thicknesses, uniform precursor deposition, and high critical current densities.Type: ApplicationFiled: July 16, 2020Publication date: November 5, 2020Inventors: Goran Majkic, Venkat Selvamanickam
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Publication number: 20200176150Abstract: An MOCVD system fabricates high quality superconductor tapes with variable thicknesses. The MOCVD system can include a gas flow chamber between two parallel channels in a housing. A substrate tape is heated and then passed through the MOCVD housing such that the gas flow is perpendicular to the tape's surface. Precursors are injected into the gas flow for deposition on the substrate tape. In this way, superconductor tapes can be fabricated with variable thicknesses, uniform precursor deposition, and high critical current densities.Type: ApplicationFiled: December 26, 2019Publication date: June 4, 2020Inventors: Goran Majkic, Venkat Selvamanickam
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Patent number: 10395799Abstract: An MOCVD system fabricates high quality superconductor tapes with variable thicknesses. The MOCVD system can include a gas flow chamber between two parallel channels in a housing. A substrate tape is heated and then passed through the MOCVD housing such that the gas flow is perpendicular to the tape's surface. Precursors are injected into the gas flow for deposition on the substrate tape. In this way, superconductor tapes can be fabricated with variable thicknesses, uniform precursor deposition, and high critical current densities.Type: GrantFiled: January 9, 2018Date of Patent: August 27, 2019Inventors: Goran Majkic, Venkat Selvamanickam
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Publication number: 20190198745Abstract: A superconductor tape and method for manufacturing, measuring, monitoring, and controlling same are disclosed. Embodiments are directed to a superconductor tape which includes a superconductor film overlying a buffer layer which overlies a substrate. In one embodiment, the superconductor film is defined as having a c-axis lattice constant higher than 11.74 Angstroms. In another embodiment, the superconductor film comprises BaMO3, where M=Zr, Sn, Ta, Nb, Hf, or Ce, and which has a (101) peak of BaMO3 elongated along an axis that is between 60° to 90° from an axis of the (001) peaks of the superconductor film. These and other embodiments achieve well-aligned nanocolumnar defects and thus a high lift factor, which can result in superior critical current performance of the tape in, for example, high magnetic fields.Type: ApplicationFiled: August 29, 2017Publication date: June 27, 2019Inventors: Goran Majkic, Venkat Selvamanickam
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Publication number: 20180130575Abstract: An MOCVD system fabricates high quality superconductor tapes with variable thicknesses. The MOCVD system can include a gas flow chamber between two parallel channels in a housing. A substrate tape is heated and then passed through the MOCVD housing such that the gas flow is perpendicular to the tape's surface. Precursors are injected into the gas flow for deposition on the substrate tape. In this way, superconductor tapes can be fabricated with variable thicknesses, uniform precursor deposition, and high critical current densities.Type: ApplicationFiled: January 9, 2018Publication date: May 10, 2018Inventors: Goran Majkic, Venkat Selvamanickam
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Patent number: 9892827Abstract: An MOCVD system fabricates high quality superconductor tapes with variable thicknesses. The MOCVD system can include a gas flow chamber between two parallel channels in a housing. A substrate tape is heated and then passed through the MOCVD housing such that the gas flow is perpendicular to the tape's surface. Precursors are injected into the gas flow for deposition on the substrate tape. In this way, superconductor tapes can be fabricated with variable thicknesses, uniform precursor deposition, and high critical current densities.Type: GrantFiled: March 13, 2014Date of Patent: February 13, 2018Inventors: Goran Majkic, Venkat Selvamanickam
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Publication number: 20160240285Abstract: An MOCVD system fabricates high quality superconductor tapes with variable thicknesses. The MOCVD system can include a gas flow chamber between two parallel channels in a housing. A substrate tape is heated and then passed through the MOCVD housing such that the gas flow is perpendicular to the tape's surface. Precursors are injected into the gas flow for deposition on the substrate tape. In this way, superconductor tapes can be fabricated with variable thicknesses, uniform precursor deposition, and high critical current densities.Type: ApplicationFiled: April 26, 2016Publication date: August 18, 2016Inventors: Goran Majkic, Venkat Selvamanickam
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Publication number: 20150357090Abstract: An MOCVD system fabricates high quality superconductor tapes with variable thicknesses. The MOCVD system can include a gas flow chamber between two parallel channels in a housing. A substrate tape is heated and then passed through the MOCVD housing such that the gas flow is perpendicular to the tape's surface. Precursors are injected into the gas flow for deposition on the substrate tape. In this way, superconductor tapes can be fabricated with variable thicknesses, uniform precursor deposition, and high critical current densities.Type: ApplicationFiled: March 13, 2014Publication date: December 10, 2015Applicant: The University of Houston SystemInventors: Goran Majkic, Venkat Selvamanickam
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Patent number: 8926868Abstract: A superconducting article comprises a substrate, a buffer layer overlying the substrate, and a high-temperature superconducting (HTS) layer overlying the buffer layer. The HTS layer includes a plurality of nanorods. A method of forming a superconducting article comprises providing a substrate, depositing a buffer layer overlying the substrate; forming a nanodot array overlying the buffer layer; depositing an array of nanorods nucleated on the nanodot array; and depositing a high-temperature superconducting (HTS) layer around the array of nanorods and overlying the buffer layer.Type: GrantFiled: July 27, 2010Date of Patent: January 6, 2015Assignees: University of Houston System, Superpower, Inc.Inventors: Venkat Selvamanickam, Goran Majkic, Maxim Martchevskii
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Publication number: 20110028328Abstract: A superconducting article comprises a substrate, a buffer layer overlying the substrate, and a high-temperature superconducting (HTS) layer overlying the buffer layer. The HTS layer includes a plurality of nanorods. A method of forming a superconducting article comprises providing a substrate, depositing a buffer layer overlying the substrate; forming a nanodot array overlying the buffer layer; depositing an array of nanorods nucleated on the nanodot array; and depositing a high-temperature superconducting (HTS) layer around the array of nanorods and overlying the buffer layer.Type: ApplicationFiled: July 27, 2010Publication date: February 3, 2011Applicant: UNIVERSITY OF HOUSTON SYSTEMInventors: Venkat SELVAMANICKAM, Goran MAJKIC, Maxim MARTCHEVSKII