Influence of exotic Mn on magnetic properties of YCo5.0-xMnxGa7.0 (0.05 <= x <= 3.0)

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	Influence of exotic Mn on magnetic properties of YCo5.0-xMnxGa7.0 (0.05 <= x <= 3.0)
	Chang H ; Rao G ; Liang J ; Guo Y ; Liu S ; Du H
刊名	applied physics a-materials science & processing
	2005
卷号	81 期号:6 页码:1309-1312
关键词	LU SINGLE-CRYSTALS
ISSN号	0947-8396
通讯作者	chang, h, chinese acad sci, inst phys, beijing natl lab condensed matter phys, beijing 100080, peoples r china. 电子邮箱地址: ghrao@aphy.iphy.ac.cn
中文摘要	the yco5.0-xmnxga7.0 compounds crystallize with the scfe6ga6-type structure. the lattice of yco5.0-xmnxga7.0 expands with the increase of the mn content for 0.05 <= x <= 2.5, but the lattice of yco2.0mn3.0ga7.0 shrinks compared with yco2.5mn2.5ga7.0. the shrinkage of the lattice is attributed to the magnetostriction of yco2.0mn3.0ga7.0. the substitution of mn for co forms magnetic clusters in the antiferromagnetic matrix. the magnetic frustration results in the spin-glass-like behavior for 0.8 <= x <= 1.5 and the difference between zero-field-cooling (zfc) and field-cooling (fc) magnetizations for x = 2.0, 2.5, and 3.0. a stable long-range magnetic ordering appears among the mn-centered magnetic clusters with the ordering temperature 110 k for x = 2.0. the hump in the thermomagnetization of yco3.0mn2.0ga7.0 can be attributed to the competitive effects between the thermal fluctuation and the enhanced magnetic interaction. both the hump and the bifurcation between the zfc and the fc magnetizations of yco3.0mn2.0ga7.0 occur at lower temperatures as the applied field increases. on the two-step magnetization curve of yco3.0mn2.0ga7.0, the inflection point at 4000 oe is due to the coercive field, and the magnetic moments in the clusters are tilted to the applied field above 4000 oe. the magnetic ordering temperature is further increased to 210 k for x = 2.5 and to 282 k for x = 3.0. the spontaneous magnetization of yco2.0mn3.0ga7.0 is 0.575 mu b/f.u. at 5 k with a canted magnetic structure.
学科主题	半导体材料
收录类别	SCI
语种	英语
公开日期	2010-03-17
内容类型	期刊论文
源URL	[http://ir.semi.ac.cn/handle/172111/8544]
专题	半导体研究所_中国科学院半导体研究所（2009年前）
推荐引用方式 GB/T 7714	Chang H,Rao G,Liang J,et al. Influence of exotic Mn on magnetic properties of YCo5.0-xMnxGa7.0 (0.05 <= x <= 3.0)[J]. applied physics a-materials science & processing,2005,81(6):1309-1312.
APA	Chang H,Rao G,Liang J,Guo Y,Liu S,&Du H.(2005).Influence of exotic Mn on magnetic properties of YCo5.0-xMnxGa7.0 (0.05 <= x <= 3.0).applied physics a-materials science & processing,81(6),1309-1312.
MLA	Chang H,et al."Influence of exotic Mn on magnetic properties of YCo5.0-xMnxGa7.0 (0.05 <= x <= 3.0)".applied physics a-materials science & processing 81.6(2005):1309-1312.