Large magnetocrystalline anisotropic energy and its impact on magnetostriction of L10-FePt

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27740%2F25%3A10256671" target="_blank" >RIV/61989100:27740/25:10256671 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11320/25:10487557

Result on the web

<a href="https://iopscience.iop.org/article/10.1088/1361-6463/ad8001" target="_blank" >https://iopscience.iop.org/article/10.1088/1361-6463/ad8001</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1361-6463/ad8001" target="_blank" >10.1088/1361-6463/ad8001</a>

Result language

angličtina

Original language name

Large magnetocrystalline anisotropic energy and its impact on magnetostriction of L10-FePt

Original language description

The origin of magnetocrystalline anisotropic energy (MAE) guided by spin-orbit coupling in the L1(0)-FePt alloy was analyzed. Correlation of MAE with the calculated magnetoelastic constants in the single and polycrystal model was determined by means of first-principles calculations using density functional theory (DFT). More specifically, a systematic analysis of the large MAE and magnetostriction coefficients (lambda&apos;s) were done by means of post-processing of eigenvalues (orbital energies) and eigenfunctions (orbital occupancies). Our numerical analysis includes the convolution of the projected wave-function (density of states) of each orbital of the Fe and Pt sub-lattices into their orbital energies, which in principle should be valid for any solid regardless of the strength of the MAE. The determined anisotropic magnetostriction coefficients are of the lambda similar to 10 (- 4)-10(-3) order for several crystallographic directions; which is in accord to the known experimental data. However, the polycrystalline model based on the uniform stress approximation leads to a decrease of the lambda by two orders in the overall magnetostrictive behavior (lambda similar to 10 (- 5)). Such a large difference is not unexpected as the magnetostriction for polycrystalline FePt thin films were recorded as very low, thus validating the robustness of the current theoretical proposition of analyzing MAE.&lt;br /&gt;

Czech name

—

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

—

OECD FORD branch

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

Project

<a href="/en/project/EH22_008%2F0004572" target="_blank" >EH22_008/0004572: Quantum materials for applications in sustainable technologies</a><br>

Continuities

—

Publication year

2025

Confidentiality

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

Name of the periodical

Journal of Physics. D, Applied Physics

ISSN

0022-3727

e-ISSN

1361-6463

Volume of the periodical

58

Issue of the periodical within the volume

3

Country of publishing house

GB - UNITED KINGDOM

Number of pages

13

Pages from-to

nestránkováno

UT code for WoS article

001347962300001

EID of the result in the Scopus database

2-s2.0-85218638144