Direct Detection of Pure ac Spin Current by X-Ray Pump-Probe Measurements

被引：62

作者：

Li, J. ^{[1
,2
]}

Shelford, L. R. ^{[3
]}

Shafer, P. ^{[4
]}

Tan, A. ^{[2
]}

Deng, J. X. ^{[2
]}

Keatley, P. S. ^{[3
]}

Hwang, C. ^{[5
]}

Arenholz, E. ^{[4
]}

van der Laan, G. ^{[6
]}

Hicken, R. J. ^{[3
]}

Qiu, Z. Q. ^{[2
]}

机构：

[1] Peking Univ, Sch Phys, Int Ctr Quantum Mat, Beijing 100871, Peoples R China

[2] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[3] Univ Exeter, Dept Phys & Astron, Stocker Rd, Exeter EX4 4QL, Devon, England

[4] Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA

[5] Korea Res Inst Stand & Sci, Yuseong 305340, Daejeon, South Korea

[6] Diamond Light Source, Magnet Spect Grp, Didcot OX11 0DE, Oxon, England

来源：

PHYSICAL REVIEW LETTERS | 2016年 / 117卷 / 07期

基金：

英国工程与自然科学研究理事会; 美国国家科学基金会; 新加坡国家研究基金会;

关键词：

MAGNETIC MULTILAYERS; ROOM-TEMPERATURE; DRIVEN; HETEROSTRUCTURES; ACCUMULATION; RELAXATION; INSULATOR; GLASSES;

D O I：

10.1103/PhysRevLett.117.076602

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Despite recent progress in spin-current research, the detection of spin current has mostly remained indirect. By synchronizing a microwave waveform with synchrotron x-ray pulses, we use the ferromagnetic resonance of the Py (Ni81Fe19) layer in a Py/Cu/Cu75Mn25/Cu/Co multilayer to pump a pure ac spin current into the Cu75Mn25 and Co layers, and then directly probe the spin current within the Cu75Mn25 layer and the spin dynamics of the Co layer by x-ray magnetic circular dichroism. This element-resolved pump-probe measurement unambiguously identifies the ac spin current in the Cu75Mn25 layer.

引用

页数：6

共 55 条

[1] Spin polarization and exchange coupling of Cu and Mn atoms in paramagnetic CuMn diluted alloys induced by a Co layer [J].

Abes, M. ;

Atkinson, D. ;

Tanner, B. K. ;

Charlton, T. R. ;

Langridge, Sean ;

Hase, T. P. A. ;

Ali, M. ;

Marrows, C. H. ;

Hickey, B. J. ;

Neudert, A. ;

Hicken, R. J. ;

Arena, D. ;

Wilkins, S. B. ;

Mirone, A. ;

Lebegue, S. .

PHYSICAL REVIEW B, 2010, 82 (18)

[2] Weakly coupled motion of individual layers in ferromagnetic resonance [J].

Arena, D. A. ;

Vescovo, E. ;

Kao, C. -C. ;

Guan, Y. ;

Bailey, W. E. .

PHYSICAL REVIEW B, 2006, 74 (06)

[3] Spintronics [J].

Bader, S. D. ;

Parkin, S. S. P. .

ANNUAL REVIEW OF CONDENSED MATTER PHYSICS, VOL 1, 2010, 1 :71-88

[4] Detection of microwave phase variation in nanometre-scale magnetic heterostructures [J].

Bailey, W. E. ;

Cheng, C. ;

Knut, R. ;

Karis, O. ;

Auffret, S. ;

Zohar, S. ;

Keavney, D. ;

Warnicke, P. ;

Lee, J. -S. ;

Arena, D. A. .

NATURE COMMUNICATIONS, 2013, 4

[5] Precessional dynamics of elemental moments in a ferromagnetic alloy [J].

Bailey, WE ;

Cheng, L ;

Keavney, DJ ;

Kao, CC ;

Vescovo, E ;

Arena, DA .

PHYSICAL REVIEW B, 2004, 70 (17) :1-4

[6] Spin pumping in Ferromagnet-Topological Insulator-Ferromagnet Heterostructures [J].

Baker, A. A. ;

Figueroa, A. I. ;

Collins-McIntyre, L. J. ;

van der Laan, G. ;

Hesjedal, T. .

SCIENTIFIC REPORTS, 2015, 5

[7] Emission of spin waves by a magnetic multilayer traversed by a current [J].

Berger, L .

PHYSICAL REVIEW B, 1996, 54 (13) :9353-9358

[8] Spin current generated by thermally driven ultrafast demagnetization [J].

Choi, Gyung-Min ;

Min, Byoung-Chul ;

Lee, Kyung-Jin ;

Cahill, David G. .

NATURE COMMUNICATIONS, 2014, 5

[9] Electronic structure of (Ga,Mn)As as seen by synchrotron radiation [J].

Edmonds, Kevin ;

van der Laan, Gerrit ;

Panaccione, Giancarlo .

SEMICONDUCTOR SCIENCE AND TECHNOLOGY, 2015, 30 (04)

[10] Optical Detection of Spin Transport in Nonmagnetic Metals [J].

Fohr, F. ;

Kaltenborn, S. ;

Hamrle, J. ;

Schultheiss, H. ;

Serga, A. A. ;

Schneider, H. C. ;

Hillebrands, B. ;

Fukuma, Y. ;

Wang, L. ;

Otani, Y. .

PHYSICAL REVIEW LETTERS, 2011, 106 (22)

← 1 2 3 4 5 6 →