Muon-Spin-Relaxation Investigation of EuMn2O5

被引：10
|
作者：
Vorob'ev, S. I. [1 ]
Golovenchits, E. I. [2 ]
Koptev, V. P. [1 ]
Komarov, E. N. [1 ]
Kotov, S. A. [1 ]
Sanina, V. A. [2 ]
Shcherbakov, G. V. [1 ]
机构：
[1] Russian Acad Sci, Petersburg Nucl Phys Inst, Gatchina 188300, Russia
[2] Russian Acad Sci, AF Ioffe Physicotech Inst, St Petersburg 194021, Russia
来源：
JETP LETTERS | 2010年 / 91卷 / 10期
关键词：
External Magnetic Field; Manganite; JETP Letter; Ceramic Sample; Local Magnetic Field;
D O I：
10.1134/S002136401010005X
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The magnetic properties of the EuMn2O5 multiferroic (samples consisting of single crystals and ceramic samples) have been investigated by the muon-spin-relaxation (mu SR) method in the temperature range of 10300 K. Below the magnetic ordering temperature T-N-40 K, the loss of the polarization of muons and the effect of the external magnetic field have been observed. Both phenomena can be explained by an additional channel of the depolarization of muons owing to the appearance of muons in a medium with a low electron density due to the charge separation process (the redistribution of the electron density in the phase transition process). The "memory" phenomenon has been revealed in a sample in the external magnetic field; the memory relaxation time depends on the size of the structure units of the samples (single crystals or ceramic grains).
引用
收藏
页码：512 / 517
页数：6
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