Patents by Inventor Md Mamun Al-Rashid

Md Mamun Al-Rashid 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).

  • Switching skyrmions with VCMA/electric field for memory, computing and information processing
    Patent number: 10957372
    Abstract: A fixed magnetic skyrmion in a memory or Boolean logic or non-Boolean computing element is reversibly switched or switchable (1) with only an electric field and without a magnetic field or spin current; and (2) using voltage control of magnetic anisotropy (VCMA) to reduce the spin current needed to switch the skyrmion. Some embodiments switch between four states: two skyrmion states and two ferromagnetic states. Other embodiments switch between two states which are both skyrmionic, in which case the switching process may use ferromagnetic intermediate states, or both ferromagnetic, in which case the switching process may use skyrmionic intermediate states, or between a Skyrmion and ferromagnetic state. Boolean and non-Boolean logic devices are also provided which are based on these switching methods.
    Type: Grant
    Filed: February 5, 2020
    Date of Patent: March 23, 2021
    Assignee: VIRGINIA COMMONWEALTH UNIVERSITY
    Inventors: Jayasimha Atulasimha, Dhritiman Bhattcaharya, Md Mamun Al-Rashid
  • Switching Skyrmions With VCMA/Electric Field for Memory, Computing and Information Processing
    Publication number: 20200211612
    Abstract: A fixed magnetic skyrmion in a memory or Boolean logic or non-Boolean computing element is reversibly switched or switchable (1) with only an electric field and without a magnetic field or spin current; and (2) using voltage control of magnetic anisotropy (VCMA) to reduce the spin current needed to switch the skyrmion. Some embodiments switch between four states: two skyrmion states and two ferromagnetic states. Other embodiments switch between two states which are both skyrmionic, in which case the switching process may use ferromagnetic intermediate states, or both ferromagnetic, in which case the switching process may use skyrmionic intermediate states, or between a Skyrmion and ferromagnetic state. Boolean and non-Boolean logic devices are also provided which are based on these switching methods.
    Type: Application
    Filed: February 5, 2020
    Publication date: July 2, 2020
    Inventors: Jayasimha Atulasimha, Dhritiman Bhattcaharya, Md Mamun Al-Rashid
  • Switching skyrmions with VCMA/electric field for memory, computing and information processing
    Patent number: 10593389
    Abstract: A fixed magnetic skyrmion in a memory or Boolean logic or non-Boolean computing element is reversibly switched or switchable (1) with only an electric field and without a magnetic field or spin current; and (2) using voltage control of magnetic anisotropy (VCMA) to reduce the spin current needed to switch the skyrmion. Some embodiments switch between four states: two skyrmion states and two ferromagnetic states. Other embodiments switch between two states which are both skyrmionic, in which case the switching process may use ferromagnetic intermediate states, or both ferromagnetic, in which case the switching process may use skyrmionic intermediate states, or between a Skyrmion and ferromagnetic state. Boolean and non-Boolean logic devices are also provided which are based on these switching methods.
    Type: Grant
    Filed: March 1, 2017
    Date of Patent: March 17, 2020
    Assignee: Virginia Commonwealth University
    Inventors: Jayasimha Atulasimha, Dhritiman Bhattcaharya, Md Mamun Al-Rashid
  • Switching Skyrmions With VCMA/Electric Field for Memory, Computing and Information Processing
    Publication number: 20190074044
    Abstract: A fixed magnetic skyrmion in a memory or Boolean logic or non-Boolean computing element is reversibly switched or switchable (1) with only an electric field and without a magnetic field or spin current; and (2) using voltage control of magnetic anisotropy (VCMA) to reduce the spin current needed to switch the skyrmion. Some embodiments switch between four states: two skyrmion states and two ferromagnetic states. Other embodiments switch between two states which are both skyrmionic, in which case the switching process may use ferromagnetic intermediate states, or both ferromagnetic, in which case the switching process may use skyrmionic intermediate states, or between a Skyrmion and ferromagnetic state. Boolean and non-Boolean logic devices are also provided which are based on these switching methods.
    Type: Application
    Filed: March 1, 2017
    Publication date: March 7, 2019
    Inventors: Jayasimha Atulasimha, Dhritiman Bhattcaharya, Md Mamun Al-Rashid