Short range magnetic correlations induced by La substitution in Ho(1-x)La(x)Mn(2)O(5)

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题名:	Short range magnetic correlations induced by La substitution in Ho(1-x)La(x)Mn(2)O(5)
作者:	Wang,CW;Wu,CM;Li,CY;Karna,SK;Hsu,CK;Li,CHC;Li,WH;Yu,CC;Wu,CP;Chou,H;Lynn,JW
贡献者:	物理學系
关键词:	RMN2O5 R;NEUTRON-DIFFRACTION;PHASE-TRANSITIONS;FERROELECTRICITY;REFINEMENT;PR;EU;ND
日期:	2010
上传时间:	2012-06-11 10:46:55 (UTC+8)
出版者:	國立中央大學
摘要:	Magnetic susceptibility, x-ray diffraction, neutron diffraction and Raman scattering measurements are employed to study the effects of La substitution on the magnetic properties of multiferroic HoMn(2)O(5). 9% and 18% La-substituted compounds crystallize into the same orthorhombic Pbam symmetry as the parent compound. The magnetic responses to an ac driving magnetic field between 40 and 140 K are greatly enhanced by 18% La substitution. The neutron magnetic diffraction patterns reveal the development of short range magnetic correlations below 140 K. In addition, two Raman peaks and a series of new x-ray diffraction peaks suddenly develop below this temperature. Incommensurate long range antiferromagnetic order appears below 38 K. Magnetic frustration could be the main mechanism governing the present observations.
關聯:	JOURNAL OF PHYSICS-CONDENSED MATTER
显示于类别:	[物理學系] 期刊論文

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