Tilted antiferromagnetic ordering of Mn in Nd0.62Ca0.38MnO3

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题名:	Tilted antiferromagnetic ordering of Mn in Nd0.62Ca0.38MnO3
作者:	Wu,SY;Li,WH;Lee,KC;Lynn,JW;Liu,RS;Wu,JB;Huang,CY
贡献者:	物理研究所
关键词:	MAGNETORESISTANCE;VALENCE
日期:	1998
上传时间:	2010-07-08 14:05:14 (UTC+8)
出版者:	中央大學
摘要:	The magnetic ordering of the Mn spins in polycrystalline Nd0.62Ca0.38MnO3 has been investigated by means of neutron diffraction and ac magnetic susceptibility measurements. Three peaks around 230, 90, and 40 K were observed in the temperature dependence of the in-phase component of the ac susceptibility, chi '(T). Neutron diffraction measurements show that the peak at 90 K is associated with the ordering of the Mn spins, and that at 40 K is due to the reorientation of the Mn spins. Both ferromagnetic and antiferromagnetic coupling between the Mn spins were observed. The spins order at T-N approximate to 130 K, with a spin structure consisting of ferromagnetically coupled, tilted antiferromagnetic sheets. No evidence was found from the neutron diffraction data to indicate that the peak around 230 K in chi '(T) is of magnetic origin, which suggests that it is associated with charge ordering. (C) 1998 American Institute of Physics.
關聯:	JOURNAL OF APPLIED PHYSICS
显示于类别:	[Graduate Institute of Physics] journal & Dissertation

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