Cluster model calculation of N near K-edge energy-loss fine structures in hexagonal GaN crystal

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	Cluster model calculation of N near K-edge energy-loss fine structures in hexagonal GaN crystal
	Gao, SP ; Zhang, WH ; Li, JM ; Zhu, J
刊名	SCIENCE IN CHINA SERIES A-MATHEMATICS PHYSICS ASTRONOMY
	2001
卷号	44 期号:12 页码:1602
关键词	SHELL PHOTOABSORPTION PROCESSES NEAR-THRESHOLD STRUCTURES INNER EXCITATION STATES
ISSN号	1006-9283
通讯作者	Gao, SP: Tsing Hua Univ, Electron Microscopy Lab, Sch Mat Sci & Engn, Beijing 100084, Peoples R China.
中文摘要	The phase relations at the 600 degreesC and 700 degreesC isothermal sections of the ternary systems R-Co-B for R Nd, Pr and R = Sm, Cd respectively were summarized in this paper. For Rm+nCo5m+3nB2n, two new types of compounds R3Co13B2 ( R = Pr, Nd, Sm, Gd, Dy, Ho, Er, Y) (m = 2, n = 1) and R5Co19B6 (R = Pr, Nd) (m = 2, n = 3) were synthesized by utilizing the principle of structural combination. Their crystal* structures and easy magnetization direction were determined by X-ray powder diffraction, and structures were refined by the Rietveld method. The Curie temperature T-C, saturation magnetization M-s and anisotropic field H-A of the new compounds were measured using a vibrating-sample magnetometer, an extraction sample magnetometer and M(H) - H curves of samples in different magnetization directions respectively. The T-C and M-s of Rm+nCo5m+3nB2n increase with increasing values of m at a given n value. H-A increases with an increase in n when m is kept invariable. The effects of the substitution of Ni for Co on the magnetic properties of Nd13Co15-xNixB2 were also investigated. It was found that T-SR decreased monotonously as the concentration of Ni increased, and at x = 3 the easy magnetization direction becomes axial at room temperature. The relations between crystal structure and magnetic properties of Rm+nCo5m+3nB2n and the possible routes of synthesizing permanent magnetic materials are also discussed.
收录类别	SCI
语种	英语
公开日期	2013-09-17
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/34753]
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	Gao, SP,Zhang, WH,Li, JM,et al. Cluster model calculation of N near K-edge energy-loss fine structures in hexagonal GaN crystal[J]. SCIENCE IN CHINA SERIES A-MATHEMATICS PHYSICS ASTRONOMY,2001,44(12):1602.
APA	Gao, SP,Zhang, WH,Li, JM,&Zhu, J.(2001).Cluster model calculation of N near K-edge energy-loss fine structures in hexagonal GaN crystal.SCIENCE IN CHINA SERIES A-MATHEMATICS PHYSICS ASTRONOMY,44(12),1602.
MLA	Gao, SP,et al."Cluster model calculation of N near K-edge energy-loss fine structures in hexagonal GaN crystal".SCIENCE IN CHINA SERIES A-MATHEMATICS PHYSICS ASTRONOMY 44.12(2001):1602.