Ultrafast magnetostructural dynamics of MnAs

被引：0

作者：

Vidal, F. ^{[1
]}

Zheng, Y. ^{[1
]}

Ferrari, E. ^{[2
]}

Allaria, E. ^{[3
]}

Spezzani, C. ^{[3
]}

Laulhe, C. ^{[4
]}

Popescu, H. ^{[5
]}

Atkinson, P. ^{[1
]}

Casaretto, N. ^{[1
]}

Eddrief, M. ^{[1
]}

Wang, H. ^{[6
]}

Zhao, J. ^{[6
]}

Seaberg, M. ^{[7
]}

Alonso-Mori, R. ^{[7
]}

Glownia, J. M. ^{[7
]}

Chollet, M. ^{[7
]}

Xu, H. ^{[8
]}

Huang, X. ^{[8
]}

Lima, F. ^{[8
]}

Khakhulin, D. ^{[8
]}

Macias, I. J. Bermudez ^{[8
]}

Vinci, D. ^{[8
]}

Biednov, M. ^{[8
]}

Jiang, Y. ^{[8
]}

Uemura, Y. ^{[8
]}

Ardana-Lamas, F. ^{[8
]}

Zalden, P. ^{[8
]}

Milne, C. ^{[8
]}

Sacchi, M. ^{[1
,5
]}

机构：

[1] Sorbonne Univ, Inst Nanosci Paris, CNRS, INSP, F-75005 Paris, France

[2] Deutsch Elektronen Synchrotron DESY, Notkestr 85, D-22607 Hamburg, Germany

[3] Elettra Sincrotrone Trieste, SS 14 km 163,5 AREA Sci Pk, I-34149 Trieste, Italy

[4] Univ Paris Saclay, CNRS, Lab Phys Solides, UMR8502, F-91405 Orsay, France

[5] Synchrotron SOLEIL, Orme Merisiers, Dept 128, F-91190 St Aubin, France

[6] Chinese Acad Sci, Inst Semicond, State Key Lab Superlatt & Microstruct, POB 912, Beijing 100083, Peoples R China

[7] SLAC Natl Accelerator Lab, Linac Coherent Light Source LCLS, Menlo Pk, CA 94025 USA

[8] European XFEL, Holzkoppel 4, D-22869 Schenefeld, Germany

来源：

PHYSICAL REVIEW B | 2024年 / 110卷 / 14期

关键词：

MAGNETORESISTANCE; VISUALIZATION; INSTRUMENT; PRESSURE;

D O I：

10.1103/PhysRevB.110.L140406

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The ultrafast dynamics of alpha-MnAs magnetization and atomic structure are studied by the time-resolved magneto-optical Kerr effect and time-resolved x-ray diffraction after photoexcitation. In the basal plane of the hexagonal unit cell, Mn atomic disorder increases on a timescale of 400 fs, comparable to the laser-induced demagnetization timescale and significantly faster than As disorder (700 fs). This differentiation of the Mn and As relaxation times is observed in the ferromagnetic phase but disappears in the paramagnetic phase. These results strongly support recent density-functional theory calculations predicting that the magnetostructural phase transition of MnAs is driven by a change in nature of the dominant interactions between Mn 3d electrons, from magnetic exchange to bonding interactions.

引用

页数：6

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