Neutron polarization analysis on the multiferroic TbMn2O5

被引：4

作者：

Chang, L. J. ^{[1
]}

Su, Y. ^{[2
]}

Schweika, W. ^{[3
]}

Brueckel, Th. ^{[2
,3
]}

Chen, Y. Y. ^{[4
]}

Jang, D. S. ^{[5
,6
]}

Liu, R. S. ^{[5
,6
]}

机构：

[1] Natl Tsing Hua Univ, Nucl Sci & Technol Dev Ctr, Hsinchu 30013, Taiwan

[2] Forschungszentrum Julich, Inst Festkorperforsch, Outstn FRM II,JCNS, D-85747 Garching, Germany

[3] Forschungszentrum Julich, Inst Festkorperforsch, D-52425 Julich, Germany

[4] Acad Sinica, Inst Phys, Taipei 115, Taiwan

[5] Natl Taiwan Univ, Dept Chem, Taipei 106, Taiwan

[6] Natl Taiwan Univ, Ctr Nano Storage Res, Taipei 106, Taiwan

来源：

PHYSICA B-CONDENSED MATTER | 2009年 / 404卷 / 17期

关键词：

Multiferroics; Neutron diffraction; Specific heat; FERROELECTRIC POLARIZATION; SCATTERING; REVERSAL;

D O I：

10.1016/j.physb.2009.06.011

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Polycrystalline TbMn2O5 was prepared by the standard solid-state reaction method and characterized by powder X-ray diffraction and magnetization to assure it is of single phase. Heat capacity measurements on the compound reveal an antiferromagnetic phase transition at similar to 45 K. A broad peak below similar to 6 K in the heat capacity measurements corresponds to the crossover transition of Tb3+ ordering. To confirm these magnetic orderings, neutron powder diffractions on TbMn2O5 with XYZ neutron polarization analysis were performed at the diffuse neutron scattering (DNS) spectrometer, FRJ-II, by using neutron wavelength of 4.8 angstrom in the temperature range of 1.8-250 K. Magnetic scattering was separated from nuclear coherent and spin incoherent scattering contributions. Long-range ordered magnetic peaks were observed below similar to 39 K which is consistent with the heat capacity results. The drastic increasing intensities below similar to 6 K indicate the ferromagnetic transition in Tb3+ orderings. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：2517 / 2519

页数：3

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