Mossbauer Investigations of Hyperfine Interactions Features of 57Fe Nuclei in BiFeO3 Ferrite

被引：19

作者：

Sobolev, Alexey ^{[1
]}

Presniakov, Igor ^{[1
]}

Rusakov, Vyacheslav ^{[1
]}

Belik, Alexey ^{[2
]}

Matsnev, Mikhail ^{[1
]}

Gorchakov, Dmitry ^{[1
]}

Glazkova, Iana ^{[1
]}

机构：

[1] Moscow MV Lomonosov State Univ, Moscow 119991, Russia

[2] Natl Inst Mat Sci, Int Ctr Mat Nanoarchitecton MANA, Tsukuba, Ibaraki 3050044, Japan

来源：

MOSSBAUER SPECTROSCOPY IN MATERIALS SCIENCE - 2014 | 2014年 / 1622卷

关键词：

Mossbauer spectroscopy; multiferroics; spin density waves; noncollinear antiferromagnets; CRYSTAL; SPECTROSCOPY;

D O I：

10.1063/1.4898617

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

New results of Fe-57 Mossbauer studies on BiFeO3 powder sample performed at various temperatures above and below magnetic phase transitions point T-N approximate to 640 K are reported. We have performed self-consistent calculations of the lattice contributions to the EFG tensor, taking into account dipole moments of the O2- and Bi3+ ions. Low-temperature Fe-57 Mossbauer spectra recorded at T < T-N were analyzed assuming an anharmonic cycloidal modulation of the Fe3+ magnetic moments. The cycloidal modulation of the iron spin was described with the elliptic Jacobi function sn[(+/-4K(m)/lambda)x,m]. The good fit of the experimental spectra was obtained for the anharmonicity m = 0.44 +/- 0.04 (T = 4.9 K) resulting from the easy-axis magnetic anisotropy.

引用

页数：5

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