Magnetic Structures of Pr0.8Lu0.2Mn2Ge2 and Pr0.6Lu0.4Mn2Ge2

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	Magnetic Structures of Pr0.8Lu0.2Mn2Ge2 and Pr0.6Lu0.4Mn2Ge2
	Wang, JL ; Studer, AJ ; Campbell, SJ ; Kennedy, SJ ; Zeng, R ; Dou, SX ; Wu, GH
刊名	IEEE TRANSACTIONS ON MAGNETICS
	2011
卷号	47 期号:10 页码:2893
关键词	NEUTRON-DIFFRACTION PHASE-DIAGRAM FERROMAGNETISM
ISSN号	0018-9464
通讯作者	Wang, JL: Univ Wollongong, Inst Superconducting & Elect Mat, Wollongong, NSW 2522, Australia.
中文摘要	The magnetic structures of Pr0.8Lu0.2Mn2Ge2 and Pr0.6Lu0.4Mn2Ge2 have been determined by neutron powder diffraction over the temperature range 10-450 K. On cooling from the paramagnetic region the Mn sublattice of Pr0.8Lu0.2Mn2Ge2 orders in a similar manner to PrMn2Ge2 with first ab-plane intralayer antiferromagnetism (AFI) below T-N(intra) similar to 397 K followed by canted ferromagnetism (Fmc) at T-C(inter) similar to 330 K and then a conical (Fmi) spin structure below T-c/c similar to 192 K. The transition at T-C(Pr) = 35 K with related enhancement in magnetization, is assigned to the additional ferromagnetic contribution of the Pr sublattice leading to the combined (Fmc+F(Pr)). For Pr0.6Lu0.4Mn2Ge2 the transition from PM to AFI occurs at T-N(intra) similar to 375 K while the canted ferromagnetic (Fmc) state forms at T-C(intra) similar to 321 K. The increased Lu concentration of Pr0.6Lu0.4Mn2Ge2 destroys the incommensurate Fmi conical spin structure of Pr0.8Lu0.4Mn2Ge2. Rather, in common with similar mixed RT2X2 systems (e.g., La1-xYxMn2Si2, La1-xPrxMn2Si2), the Pr0.6Lu0.4Mn2Ge2 compound exhibits co-existence of the AFmc and Fmc phases on cooling from the pure Fmc state. Transformation to the combined ferromagnetic state (Fmc+F(Pr)) takes place on c-axis ordering of the Pr sublattice at T-C(Pr) similar to 31 K. In the region of phase co-existence, the Fmc unit cell is larger than the AFmc unit cell indicating strong magneto-structural coupling with a change of the lattice inducing a change of the magnetic state.
收录类别	SCI
语种	英语
公开日期	2013-09-18
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/41433]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Wang, JL,Studer, AJ,Campbell, SJ,et al. Magnetic Structures of Pr0.8Lu0.2Mn2Ge2 and Pr0.6Lu0.4Mn2Ge2[J]. IEEE TRANSACTIONS ON MAGNETICS,2011,47(10):2893.
APA	Wang, JL.,Studer, AJ.,Campbell, SJ.,Kennedy, SJ.,Zeng, R.,...&Wu, GH.(2011).Magnetic Structures of Pr0.8Lu0.2Mn2Ge2 and Pr0.6Lu0.4Mn2Ge2.IEEE TRANSACTIONS ON MAGNETICS,47(10),2893.
MLA	Wang, JL,et al."Magnetic Structures of Pr0.8Lu0.2Mn2Ge2 and Pr0.6Lu0.4Mn2Ge2".IEEE TRANSACTIONS ON MAGNETICS 47.10(2011):2893.