Neutron study of magnetic correlations in rare-earth-free Mn-Bi magnets

被引：2

作者：

Malyeyev, Artem ^{[1
]}

Titov, Ivan ^{[1
]}

Bender, Philipp ^{[1
,3
]}

Bersweiler, Mathias ^{[1
]}

Pipich, Vitaliy ^{[2
]}

Muhlbauer, Sebastian ^{[3
]}

Ener, Semih ^{[4
]}

Gutfleisch, Oliver ^{[4
]}

Michels, Andreas ^{[1
]}

机构：

[1] Univ Luxembourg, Dept Phys & Mat Sci, 162A Ave Faiencerie, L-1511 Luxembourg, Luxembourg

[2] Forschungszentrum Julich, Julich Ctr Neutron Sci JCNS, Heinz Maier Leibnitz Zentrum MLZ, Lichtenbergstr 1, D-85748 Garching, Germany

[3] Tech Univ Munich, Heinz Maier Leibnitz Zentrum MLZ, D-85748 Garching, Germany

[4] Tech Univ Darmstadt, Inst Mat Sci, D-64287 Darmstadt, Germany

来源：

PHYSICAL REVIEW MATERIALS | 2021年 / 5卷 / 03期

关键词：

SMALL-ANGLE SCATTERING; ENERGY PRODUCT; COERCIVITY; ALLOYS; MICROSTRUCTURE; PERFORMANCE; SIMULATION;

D O I：

10.1103/PhysRevMaterials.5.034407

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report the results of an unpolarized small-angle neutron scattering (SANS) study on Mn-Bi-based rare-earth-free permanent magnets. The magnetic SANS cross section is dominated by long-wavelength transversal magnetization fluctuations, and has been analyzed in terms of the Guinier-Porod model and the distance distribution function. This provides the radius of gyration which, in the remanent state, ranges between about 220 - 240 nm for the three different alloy compositions investigated. Moreover, computation of the distance distribution function, in conjunction with results for the so-called s parameter obtained from the Guinier-Porod model, indicates that the magnetic scattering of a Mn45Bi55 sample has its origin in slightly shape-anisotropic structures.

引用

页数：7

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