Patents by Inventor Gyungchoon GO
Gyungchoon GO 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).
-
Patent number: 11107513Abstract: A magnetic memory according to one embodiment of the present invention comprises: a magnetic tunnel junction comprising a free layer, a reference layer, and a tunnel barrier layer disposed between the free layer and the reference layer; a first conductive line disposed adjacent to the free layer; and a second conductive line disposed adjacent to the free layer and intersecting the first conductive line. A magnetization switching method of the magnetic memory comprises the steps of: applying an alternating current-type first current having a first frequency to the first conductive line; and applying an alternating current-type second current having the first frequency to the second conductive line. The free layer performs magnetization reversal, using the first current and the second current, and the magnetic tunnel junction is disposed on an intersection point between the first conductive line and the second conductive line.Type: GrantFiled: May 20, 2020Date of Patent: August 31, 2021Assignee: Korea University Research and Business FoundationInventors: Kyung-Jin Lee, Gyungchoon Go, Seung-Jae Lee
-
Patent number: 10886460Abstract: A magnetic device includes: a conductive layer into which current is injected in a first direction, the conductive layer causing spin Hall effect or Rashba effect; a ferromagnetic layer disposed in contact with the conductive layer such that the ferromagnetic layer and the conductive layer are stacked on each other, a magnetization direction of the ferromagnetic layer being switched; and a spin filter structure having a fixed magnetization direction, the spin filter structure being disposed on at least one of the opposite side surfaces of the first direction of the conductive layer to inject spin-polarized current into the conductive layer.Type: GrantFiled: March 30, 2020Date of Patent: January 5, 2021Assignee: Korea University Research and Business FoundationInventors: Young Keun Kim, Kyung-Jin Lee, Gyungchoon Go
-
Publication number: 20200286537Abstract: A magnetic memory according to one embodiment of the present invention comprises: a magnetic tunnel junction comprising a free layer, a reference layer, and a tunnel barrier layer disposed between the free layer and the reference layer; a first conductive line disposed adjacent to the free layer; and a second conductive line disposed adjacent to the free layer and intersecting the first conductive line. A magnetization switching method of the magnetic memory comprises the steps of: applying an alternating current-type first current having a first frequency to the first conductive line; and applying an alternating current-type second current having the first frequency to the second conductive line. The free layer performs magnetization reversal, using the first current and the second current, and the magnetic tunnel junction is disposed on an intersection point between the first conductive line and the second conductive line.Type: ApplicationFiled: May 20, 2020Publication date: September 10, 2020Applicant: KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATIONInventors: Kyung-Jin LEE, Gyungchoon GO, Seung-Jae LEE
-
Patent number: 10734051Abstract: Embodiments provide a magnetic memory device and a method of writing a magnetic memory device. The magnetic memory device includes a magnetic tunnel junction including a reference layer, a free layer and a tunnel barrier layer between the reference and free layers, and a first conductive line adjacent to the free layer. A first spin-orbit current having a frequency decreasing with time flows through the first conductive line. The writing method includes applying the first spin-orbit current having the frequency decreasing with time to the first conductive line.Type: GrantFiled: October 3, 2019Date of Patent: August 4, 2020Assignee: Samsung Electronics Co., Ltd.Inventors: Woo Chang Lim, Kyung-Jin Lee, Gyungchoon Go, Seung-Jae Lee
-
Publication number: 20200227630Abstract: A magnetic device includes: a conductive layer into which current is injected in a first direction, the conductive layer causing spin Hall effect or Rashba effect; a ferromagnetic layer disposed in contact with the conductive layer such that the ferromagnetic layer and the conductive layer are stacked on each other, a magnetization direction of the ferromagnetic layer being switched; and a spin filter structure having a fixed magnetization direction, the spin filter structure being disposed on at least one of the opposite side surfaces of the first direction of the conductive layer to inject spin-polarized current into the conductive layer.Type: ApplicationFiled: March 30, 2020Publication date: July 16, 2020Inventors: Young Keun Kim, Kyung-Jin Lee, Gyungchoon Go
-
Patent number: 10608169Abstract: A magnetic device includes a conductive layer into which current can be injected in a first direction, the conductive layer causing spin Hall effect or Rashba effect. A ferromagnetic layer is disposed in contact with the conductive layer such that the ferromagnetic layer and the conductive layer are stacked on each other, a magnetization direction of the ferromagnetic layer being switched. A spin filter structure has a fixed magnetization direction, the spin filter structure being disposed on at least one of the opposite side surfaces of the first direction of the conductive layer to inject spin-polarized current into the conductive layer.Type: GrantFiled: June 30, 2017Date of Patent: March 31, 2020Assignee: Korea University Research and Business FoundationInventors: Young Keun Kim, Kyung-Jin Lee, Gyungchoon Go
-
Publication number: 20200035279Abstract: Embodiments provide a magnetic memory device and a method of writing a magnetic memory device. The magnetic memory device includes a magnetic tunnel junction including a reference layer, a free layer and a tunnel barrier layer between the reference and free layers, and a first conductive line adjacent to the free layer. A first spin-orbit current having a frequency decreasing with time flows through the first conductive line. The writing method includes applying the first spin-orbit current having the frequency decreasing with time to the first conductive line.Type: ApplicationFiled: October 3, 2019Publication date: January 30, 2020Inventors: Woo Chang LIM, Kyung-Jin LEE, Gyungchoon GO, Seung-Jae LEE
-
Patent number: 10482939Abstract: Embodiments provide a magnetic memory device and a method of writing a magnetic memory device. The magnetic memory device includes a magnetic tunnel junction including a reference layer, a free layer and a tunnel barrier layer between the reference and free layers, and a first conductive line adjacent to the free layer. A first spin-orbit current having a frequency decreasing with time flows through the first conductive line. The writing method includes applying the first spin-orbit current having the frequency decreasing with time to the first conductive line.Type: GrantFiled: November 27, 2017Date of Patent: November 19, 2019Assignees: SAMSUNG ELECTRONICS CO., LTD., KOREA UNIVERSITY Research and Business FoundationInventors: Woo Chang Lim, Kyung-Jin Lee, Gyungchoon Go, Seung-Jae Lee
-
Publication number: 20180190899Abstract: A magnetic device includes a conductive layer into which current can be injected in a first direction, the conductive layer causing spin Hall effect or Rashba effect. A ferromagnetic layer is disposed in contact with the conductive layer such that the ferromagnetic layer and the conductive layer are stacked on each other, a magnetization direction of the ferromagnetic layer being switched. A spin filter structure has a fixed magnetization direction, the spin filter structure being disposed on at least one of the opposite side surfaces of the first direction of the conductive layer to inject spin-polarized current into the conductive layer.Type: ApplicationFiled: June 30, 2017Publication date: July 5, 2018Inventors: Young Keun Kim, Kyung-Jin Lee, Gyungchoon Go
-
Publication number: 20180151209Abstract: Embodiments provide a magnetic memory device and a method of writing a magnetic memory device. The magnetic memory device includes a magnetic tunnel junction including a reference layer, a free layer and a tunnel barrier layer between the reference and free layers, and a first conductive line adjacent to the free layer. A first spin-orbit current having a frequency decreasing with time flows through the first conductive line. The writing method includes applying the first spin-orbit current having the frequency decreasing with time to the first conductive line.Type: ApplicationFiled: July 25, 2017Publication date: May 31, 2018Applicant: KOREA UNIVERSITY Research and Business FoundationInventors: Woo Chang LIM, Kyung-Jin LEE, Gyungchoon GO, Seung-Jae LEE
-
Publication number: 20180151212Abstract: Embodiments provide a magnetic memory device and a method of writing a magnetic memory device. The magnetic memory device includes a magnetic tunnel junction including a reference layer, a free layer and a tunnel barrier layer between the reference and free layers, and a first conductive line adjacent to the free layer. A first spin-orbit current having a frequency decreasing with time flows through the first conductive line. The writing method includes applying the first spin-orbit current having the frequency decreasing with time to the first conductive line.Type: ApplicationFiled: November 27, 2017Publication date: May 31, 2018Inventors: Woo Chang LIM, Kyung-Jin LEE, Gyungchoon GO, Seung-Jae LEE