Magnetic properties of Nd{sub 2}Fe{sub 14{minus}x}Be{sub x}B

Journal Article · Mon Sep 01 04:00:00 EDT 1997 · IEEE Transactions on Magnetics

OSTI ID:566428

Li, H S ^[1]; Mohanty, R C ^[1]; Raman, A; Grenier, C G ^[2]; Cadogan, J M ^[3]

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1. Southern Univ., Baton Rouge, LA (United States). Southern Research Inst. of Pure and Applied Sciences
2. Louisiana State Univ., Baton Rouge, LA (United States)
3. Univ. of New South Wales, Sydney, New South Wales (Australia). School of Physics

The Be-substituted Nd{sub 2}(Fe{sub 14{minus}x}Be{sub x})B compounds have been successfully prepared. The observed linear reduction of the unit cell volume with the Be substitution indicates that the Be atoms enter almost exclusively the Fe sites. Both the Curie temperature and magnetization are weakened upon the Be substitution; the reduction in T{sub C} is about 26K/Be atom and the reduction in the average Fe moment is about 0.26 {mu}{sub B}/Be atom, respectively. The fits to room temperature Moessbauer spectrum of Nd{sub 2}(Fe{sub 13}Be)B gives an average hyperfine field of 23.7 T. The room temperature anisotropy of Be substituted Nd{sub 2}(Fe{sub 14{minus}x}Be{sub x})B compounds is around 8 T which is nearly unchanged, compared to the parent Nd{sub 2}Fe{sub 14}B compound. Moreover, the Be substitution leads to an increase in the canting angle at 10 K, from 28 to {approximately}36{degree}, and a decrease in the spin-reorientation temperature from 131 K to 123 for Be{sub 0.5} and 112 K for Be{sub 1.0} substitution, respectively. These effects indicate a weakened A{sub 20} value and/or an enhanced A{sub 40} value for Nd atoms.

• Sponsoring Organization: USDOE, Washington, DC (United States); Australian Research Council, Canberra, ACT (Australia)
• OSTI ID: 566428
• Report Number(s): CONF-970468--
• Journal Information: IEEE Transactions on Magnetics, Journal Name: IEEE Transactions on Magnetics Journal Issue: 5Pt2 Vol. 33; ISSN IEMGAQ; ISSN 0018-9464
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BERYLLIUM ADDITIONS
BORON ALLOYS
CRYSTAL STRUCTURE
CURIE POINT
EXPERIMENTAL DATA
IRON BASE ALLOYS
MAGNETIC PROPERTIES
METALLURGICAL EFFECTS
NEODYMIUM ALLOYS