Magnetite (Fe3O4): a new variant of relaxor multiferroic?

被引：45
|
作者：
Ziese, M. [1 ]
Esquinazi, P. D. [1 ]
Pantel, D. [2 ]
Alexe, M. [2 ]
Nemes, N. M. [3 ]
Garcia-Hernandez, M. [4 ]
机构：
[1] Univ Leipzig, Fac Phys & Geosci, Div Superconduct & Magnetism, D-04103 Leipzig, Germany
[2] Max Planck Inst Microstruct Phys, D-06120 Halle, Germany
[3] Univ Complutense Madrid, GFMC Dept Fis Aplicada 3, E-28040 Madrid, Spain
[4] CSIC, Inst Ciencia Mat Madrid, E-28049 Madrid, Spain
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 2012年 / 24卷 / 08期
关键词：
LOW-TEMPERATURE PHASE; ELECTRIC-FIELD DEPENDENCE; VERWEY TRANSITION; SINGLE-CRYSTAL; HEAT-CAPACITY; MAGNETOSTRICTION; POINT; FILMS; ANISOTROPY; FERRITES;
D O I：
10.1088/0953-8984/24/8/086007
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The electric polarization, dielectric permittivity, magnetoelectric effect, heat capacity, magnetization and ac susceptibility of magnetite films and polycrystals were investigated. The electric polarization of magnetite films with saturation values between 4 and 8 mu C cm(-2) was found to vanish between 32 and 38 K, but in polycrystals no phase transition was detected in this range by heat capacity. Both types of samples showed magnetoelectric effects at low temperatures below a frequency-dependent crossover. This is interpreted as arising from multiferroic relaxor behavior.
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页数：8
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