Magnetic properties of BiMnO3 studied with dc and ac magnetization and specific heat

被引：47

作者：

Belik, Alexei A. ^{[1
]}

Takayama-Muromachi, Eiji ^{[1
]}

机构：

[1] Natl Inst Mat Sci, Adv Nano Mat Lab, Tsukuba, Ibaraki 3050044, Japan

来源：

INORGANIC CHEMISTRY | 2006年 / 45卷 / 25期

关键词：

D O I：

10.1021/ic061400b

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Magnetic and specific heat measurements were performed in a single-phased powder BiMnO3 sample prepared at 6 GPa and 1383 K. The imaginary part of the ac susceptibilities showed strong frequency dependence below the ferromagnetic Curie temperature of 98 K. The relaxation measurements revealed time-dependent magnetic properties below 98 K. These data indicate the appearance of a "spin-glass-like" state in BiMnO3. Specific heat measurements showed the existence of ferromagnetic spin waves. However, no simple term C-m proportional to T-3/2 was found indicating an unconventional behavior of the magnetic specific heat. The Debye temperature was estimated to be 410 K using isostructural compounds BiScO3 and BiCrO3.

引用

页码：10224 / 10229

页数：6

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