MAGNETISM, PHASE-COMPOSITION, AND HYPERFINE FIELDS OF MELT-SPUN ND-FE-B ALLOYS WITH A A FEW PERCENT OF NEODYMIUM

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	MAGNETISM, PHASE-COMPOSITION, AND HYPERFINE FIELDS OF MELT-SPUN ND-FE-B ALLOYS WITH A A FEW PERCENT OF NEODYMIUM
	CHENG, ZH ; SHEN, BG ; MAO, MX ; SUN, JJ ; ZHANG, YD ; LI, FS
刊名	PHYSICAL REVIEW B
	1995
卷号	52 期号:13 页码:9427
关键词	SHORT-RANGE ORDER PERMANENT-MAGNETS AMORPHOUS-ALLOYS MAIN PHASE MOSSBAUER CRYSTALLINE ND2FE14B NMR ND4FE77B19 COMPOUND
ISSN号	0163-1829
通讯作者	CHENG, ZH: CHINESE ACAD SCI,INST PHYS,STATE KEY LAB MAGNETISM,POB 603,BEIJING 100080,PEOPLES R CHINA.
中文摘要	It is possible that melt-spun Nd-Fe-B alloys with a few percent of neodymium can be used as a raw material for inexpensive and bonded permanent magnets. After an appropriate heat treatment, melt-spun Nd4Fe77.5B18.5 alloy has a coercive field of 3 kOe, a remanent magnetization of 12.5 kG, and an energy product of 13 MG Oe. However, at present, there is some debate on the origin of its hard magnetic properties. In the present work, the phase composition, magnetism, and hyperfine fields of melt-spun Nd-Fe-B alloys are studied. The effect of rare-earth element substitution for Nd, such as Pr, Gd, and Dy, on B-11 and Fe-57 magnetic hyperfine fields is also investigated. On the basis of the experimental results, the origin of the hard magnetic properties is discussed. The results indicate that (1) the melt-spun Nd-Fe-B alloys with a low Nd concentration annealed under an optimal heat treatment consist of body-centered-tetragonal Fe3B (bct-Fe3B) and a few percent of alpha-Fe and no Nd2Fe14B magnetically hard phase; (2) about 5 at. % Fe atoms in Fe-III(8g) site of bct-Fe3B are replaced by Nd atoms in the samples annealed under optimal condition. NMR radio frequency (rf) enhancement effect results demonstrate that bct-Fe3B containing Nd atoms has better permanent magnetic properties; (3) the substitution of some rare-earth elements, such as Pr, Gd, and Dy, does not influence the hyperfine field for Fe-57 in alpha-Fe; however, the hyperfine held for B-11 in bct-Fe3B increases with the addition of Gd or Dy. Thus, it can be concluded that the hard magnetic properties of melt-spun Nd-Fe-B with a few percent of neodymium result from bct-Fe3B containing Nd atoms, and not from the presence of the Nd2Fe14B magnetically hard phase.
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/311004/41568]
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	CHENG, ZH,SHEN, BG,MAO, MX,et al. MAGNETISM, PHASE-COMPOSITION, AND HYPERFINE FIELDS OF MELT-SPUN ND-FE-B ALLOYS WITH A A FEW PERCENT OF NEODYMIUM[J]. PHYSICAL REVIEW B,1995,52(13):9427.
APA	CHENG, ZH,SHEN, BG,MAO, MX,SUN, JJ,ZHANG, YD,&LI, FS.(1995).MAGNETISM, PHASE-COMPOSITION, AND HYPERFINE FIELDS OF MELT-SPUN ND-FE-B ALLOYS WITH A A FEW PERCENT OF NEODYMIUM.PHYSICAL REVIEW B,52(13),9427.
MLA	CHENG, ZH,et al."MAGNETISM, PHASE-COMPOSITION, AND HYPERFINE FIELDS OF MELT-SPUN ND-FE-B ALLOYS WITH A A FEW PERCENT OF NEODYMIUM".PHYSICAL REVIEW B 52.13(1995):9427.