Mode-dependent damping in metallic antiferromagnets due to intersublattice spin pumping

Liu, Qian1,2; Yuan, H. Y.3; Xia, Ke1,2,4; Yuan, Zhe1,2

2017-11-13

10.1103/PhysRevMaterials.1.061401

Physical Review Materials   影响因子和分区

2475-9953

Damping in magnetization dynamics characterizes the dissipation of magnetic energy and is essential for improving the performance of spintronics-based devices. While the damping of ferromagnets has been well studied and can be artificially controlled in practice, the damping parameters of antiferromagnetic materials are nevertheless little known for their physical mechanisms or numerical values. Here we calculate the damping parameters in antiferromagnetic dynamics using the generalized scattering theory of magnetization dissipation combined with the first-principles transport computation. For the PtMn, IrMn, PdMn, and FeMn metallic antiferromagnets, the damping coefficient associated with the motion of magnetization (alpha(m)) is 1-3 orders of magnitude larger than the other damping coefficient associated with the variation of the Neel order (alpha(n)), in sharp contrast to the assumptions made in the literature.

SCI ; EI

英语

其他

National Natural Science Foundation of China[61774018] ; National Natural Science Foundation of China[61704071] ; National Natural Science Foundation of China[61774017] ; National Natural Science Foundation of China[11734004] ; National Natural Science Foundation of China[21421003]

Materials Science

Materials Science, Multidisciplinary

WOS:000416595300001

AMER PHYSICAL SOC

20191306694123

Antiferromagnetic materials ; Antiferromagnetism ; Binary alloys ; Computation theory ; Iridium alloys ; Iron alloys ; Magnetization ; Manganese alloys ; Palladium alloys ; Platinum alloys

Manganese and Alloys:543.2 ; Iron Alloys:545.2 ; Precious Metals:547.1 ; Magnetism: Basic Concepts and Phenomena:701.2 ; Magnetic Materials:708.4 ; Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory:721.1 ; Mechanics:931.1

Web of Science

1.Beijing Normal Univ, Ctr Adv Quantum Studies, Beijing 100875, Peoples R China
2.Beijing Normal Univ, Dept Phys, Beijing 100875, Peoples R China
3.South Univ Sci & Technol China, Dept Phys, Shenzhen 518055, Guangdong, Peoples R China
4.Hunan Normal Univ, SICQEA, Changsha 410081, Hunan, Peoples R China

Liu, Qian,Yuan, H. Y.,Xia, Ke,et al. Mode-dependent damping in metallic antiferromagnets due to intersublattice spin pumping[J]. Physical Review Materials,2017,1(6).

Liu, Qian,Yuan, H. Y.,Xia, Ke,&Yuan, Zhe.(2017).Mode-dependent damping in metallic antiferromagnets due to intersublattice spin pumping.Physical Review Materials,1(6).

Liu, Qian,et al."Mode-dependent damping in metallic antiferromagnets due to intersublattice spin pumping".Physical Review Materials 1.6(2017).