US 11,871,678 B2
Magnetic memory device and operation method thereof
Yoshiaki Sonobe, Yokohama (JP); Syuta Honda, Osaka (JP); Yasuaki Nakamura, Ehime (JP); and Yoshihiro Okamoto, Ehime (JP)
Assigned to Samsung Electronics Co., Ltd., Gyeonggi-do (KR); Kansai University, Osaka (JP); and National University Corporation Ehime University, Ehime (JP)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Jan. 21, 2022, as Appl. No. 17/580,971.
Claims priority of application No. 2021-008391 (JP), filed on Jan. 22, 2021.
Prior Publication US 2022/0238796 A1, Jul. 28, 2022
Int. Cl. G11C 11/16 (2006.01); H10N 50/10 (2023.01); H10B 61/00 (2023.01); H10N 50/80 (2023.01); H10N 50/85 (2023.01)
CPC H10N 50/10 (2023.02) [G11C 11/161 (2013.01); G11C 11/1673 (2013.01); G11C 11/1675 (2013.01); G11C 11/1697 (2013.01); H10B 61/00 (2023.02); H10N 50/80 (2023.02); H10N 50/85 (2023.02)] 19 Claims
OG exemplary drawing
 
1. A magnetic memory device, comprising:
a first magnetic memory device;
a second magnetic memory device connected to the first magnetic memory device;
a pulse power supplying current pulses to the first and second magnetic memory devices; and
a switch configured to selectively connect the pulse power to one of the first and second magnetic memory devices,
wherein each of the first and second magnetic memory devices comprises a first fixed layer, a first non-magnetic layer, a free layer, a second non-magnetic layer, and a second fixed layer, which are sequentially stacked, the first fixed layer having a magnetization direction maintained in a fixed direction, the free layer having a perpendicular magnetic anisotropy and a variable magnetization direction, the second fixed layer having a magnetization direction maintained in an opposite direction of the first fixed layer, and
a resistance value of an MTJ device composed of the first fixed layer, the first non-magnetic layer, and the free layer is different from a resistance value of an MTJ device composed of the second fixed layer, the second non-magnetic layer, and the free layer.