Raman studies of spin-phonon coupling in hexagonal BaFe12O19

被引：52

作者：

Chen, Xiang-Bai ^{[1
,2
]}

Nguyen Thi Minh Hien ^{[3
,4
]}

Han, Kiok ^{[3
,4
]}

Sur, Jung Chul ^{[5
]}

Sung, N. H. ^{[6
]}

Cho, B. K. ^{[6
,7
]}

Yang, In-Sang ^{[3
,4
]}

机构：

[1] Konkuk Univ, Dept Nano Sci & Mech Engn, Chungju 380701, South Korea

[2] Konkuk Univ, Nanotechnol Res Ctr, Chungju 380701, South Korea

[3] Ewha Womans Univ, Dept Phys, Seoul 120750, South Korea

[4] Ewha Womans Univ, Div Nano Sci, Seoul 120750, South Korea

[5] Wonkwang Univ, Div Microelect & Display Technol, Iksan 570749, South Korea

[6] GIST, Sch Mat Sci & Engn, Kwangju 500712, South Korea

[7] GIST, Dept Photon & Appl Phys, Kwangju 500712, South Korea

来源：

JOURNAL OF APPLIED PHYSICS | 2013年 / 114卷 / 01期

基金：

新加坡国家研究基金会;

关键词：

BARIUM; NANOPARTICLES; SPECTRUM; FERRITE;

D O I：

10.1063/1.4812575

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Phonon softening in hexagonal BaFe12O19 single crystal is observed in temperature dependent polarized Raman spectroscopy. The phonon softening is significantly enhanced below similar to 80K, at which the magnetization in a magnetic field along c-axis shows a clear change in the temperature dependence, indicating a magnetic phase transition near 80K. Possible interpretations of the anomalous temperature dependence of the phonon frequencies-phonon softening behaviors are discussed. The phonon softening would be correlated to local structural and magnetic phase transition in hexagonal BaFe12O19, in which the spin-phonon coupling would have major contribution for the phonon softening. We also discuss that the spin-phonon coupling would be affected by both the spin ordering and the individual phonon vibration in magnetic material. (C) 2013 AIP Publishing LLC.

引用

页数：6

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