Beyond a phenomenological description of magnetostriction

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F18%3A10374599" target="_blank" >RIV/00216208:11320/18:10374599 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1038/s41467-017-02730-7" target="_blank" >https://doi.org/10.1038/s41467-017-02730-7</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/s41467-017-02730-7" target="_blank" >10.1038/s41467-017-02730-7</a>

Result language

angličtina

Original language name

Beyond a phenomenological description of magnetostriction

Original language description

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.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Nature Communications [online]

ISSN

2041-1723

e-ISSN

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Volume of the periodical

9

Issue of the periodical within the volume

January

Country of publishing house

GB - UNITED KINGDOM

Number of pages

9

Pages from-to

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UT code for WoS article

000423430900008

EID of the result in the Scopus database

2-s2.0-85041120532