Beyond a phenomenological description of magnetostriction

被引：61

作者：

Reid, A. H. ^{[1
,2
]}

Shen, X. ^{[3
]}

Maldonado, P. ^{[4
]}

Chase, T. ^{[1
,5
]}

Jal, E. ^{[1
,6
]}

Granitzka, P. W. ^{[1
,7
]}

Carva, K. ^{[8
]}

Li, R. K. ^{[3
]}

Li, J. ^{[9
]}

Wu, L. ^{[9
]}

Vecchione, T. ^{[3
]}

Liu, T. ^{[1
,10
]}

Chen, Z. ^{[1
,10
]}

Higley, D. J. ^{[1
,5
]}

Hartmann, N. ^{[2
]}

Coffee, R. ^{[2
]}

Wu, J. ^{[3
]}

Dakovski, G. L. ^{[2
]}

Schlotter, W. F. ^{[2
]}

Ohldag, H. ^{[11
]}

Takahashi, Y. K. ^{[12
]}

Mehta, V. ^{[13
,14
]}

Hellwig, O. ^{[13
,15
,16
]}

Fry, A. ^{[2
]}

Zhu, Y. ^{[9
]}

Cao, J. ^{[17
,18
]}

Fullerton, E. E. ^{[19
]}

Stohr, J. ^{[1
]}

Oppeneer, P. M. ^{[4
]}

Wang, X. J. ^{[3
]}

Durr, H. A. ^{[1
,4
]}

机构：

[1] SLAC Natl Accelerator Lab, Stanford Inst Mat & Energy Sci, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA

[2] SLAC Natl Accelerator Lab, Linac Coherent Light Source, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA

[3] SLAC Natl Accelerator Lab, Accelerator Div, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA

[4] Uppsala Univ, Dept Phys & Astron, POB 516, S-75120 Uppsala, Sweden

[5] Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA

[6] Univ Paris 06, UPMC, Sorbonne Univ, CNRS,Lab Chim Phys Matiere & Rayonnement, F-75005 Paris, France

[7] Univ Amsterdam, Van der Waals Zeeman Inst, NL-1018 XE Amsterdam, Netherlands

[8] Charles Univ Prague, Dept Condensed Matter Phys, Fac Math & Phys, Ke Karlovu 5, CZ-12116 Prague 2, Czech Republic

[9] Brookhaven Natl Lab, Upton, NY 11973 USA

[10] Stanford Univ, Dept Phys, Stanford, CA 94305 USA

[11] SLAC Natl Accelerator Lab, Stanford Synchrotron Radiat Lab, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA

[12] Natl Inst Mat Sci, Magnet Mat Unit, Tsukuba, Ibaraki 3050047, Japan

[13] HGST Western Digital Co, San Jose Res Ctr, 3403 Yerba Buena Rd, San Jose, CA 95135 USA

[14] Thomas J Watson Res Ctr, 1101 Kitchawan Rd, Yorktown Hts, NY 10598 USA

[15] Tech Univ Chemnitz, Inst Phys, Reichenhainer Str 70, D-09107 Chemnitz, Germany

[16] Helmholtz Zentrum Dresden Rossendorf, Inst Ion Beam Phys & Mat Res, D-01328 Dresden, Germany

[17] Florida State Univ, Dept Phys, Tallahassee, FL 32310 USA

[18] Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA

[19] Univ Calif San Diego, Ctr Memory & Recording Res, 9500 Gilman Dr, La Jolla, CA 92093 USA

来源：

NATURE COMMUNICATIONS | 2018年 / 9卷

基金：

瑞典研究理事会;

关键词：

ANGULAR-MOMENTUM; THIN-FILMS; ULTRAFAST; DYNAMICS; STRESS; IRON; GOLD;

D O I：

10.1038/s41467-017-02730-7

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Magnetostriction, the strain induced by a change in magnetization, is a universal effect in magnetic materials. Owing to the difficulty in unraveling its microscopic origin, it has been largely treated phenomenologically. Here, we show how the source of magnetostriction-the underlying magnetoelastic stress-can be separated in the time domain, opening the door for an atomistic understanding. X-ray and electron diffraction are used to separate the subpicosecond spin and lattice responses of FePt nanoparticles. Following excitation with a 50-fs laser pulse, time-resolved X-ray diffraction demonstrates that magnetic order is lost within the nanoparticles with a time constant of 146 fs. Ultrafast electron diffraction reveals that this demagnetization is followed by an anisotropic, three-dimensional lattice motion. Analysis of the size, speed, and symmetry of the lattice motion, together with ab initio calculations accounting for the stresses due to electrons and phonons, allow us to reveal the magnetoelastic stress generated by demagnetization.

引用

页数：9

共 44 条

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