Anisometric mesoscale nuclear and magnetic texture in sintered Nd-Fe-B magnets

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F20%3A00525030" target="_blank" >RIV/61389005:_____/20:00525030 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1103/PhysRevMaterials.4.054419" target="_blank" >https://doi.org/10.1103/PhysRevMaterials.4.054419</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevMaterials.4.054419" target="_blank" >10.1103/PhysRevMaterials.4.054419</a>

Result language

angličtina

Original language name

Anisometric mesoscale nuclear and magnetic texture in sintered Nd-Fe-B magnets

Original language description

By means of temperature and wavelength-dependent small-angle neutron scattering (SANS) experiments on sintered isotropic and textured Nd-Fe-B magnets we provide evidence for the existence of an anisometric structure in the microstructure of the textured magnets. This conclusion is reached by observing a characteristic cross-shaped angular anisotropy in the total unpolarized SANS cross section at temperatures well above the Curie temperature. Comparison of the experimental SANS data to a microstructural model based on the superquadrics form factor allows us to estimate the shape and lower bounds for the size of the structure. Subtraction of the scattering cross section in the paramagnetic regime from data taken at room temperature provides the magnetic SANS cross section. Surprisingly, the anisotropy of the magnetic scattering is very similar to the nuclear SANS signal, suggesting that the nuclear structure is decorated by the magnetic moments via spin-orbit coupling. Based on the computation of the two-dimensional correlation function we estimate lower bounds for the longitudinal and transversal magnetic correlation lengths.

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

2020

Confidentiality

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

Name of the periodical

Physical Review Materials

ISSN

2475-9953

e-ISSN

—

Volume of the periodical

4

Issue of the periodical within the volume

5

Country of publishing house

US - UNITED STATES

Number of pages

6

Pages from-to

054419

UT code for WoS article

000536405700005

EID of the result in the Scopus database

2-s2.0-85093654325