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Title: Structural and magnetic properties of melt-spun rare earth-iron-boron alloys

Abstract

Intrinsic coercivities and energy products as large as 20 kOe and 14 MGOe, respectively, have been observed in Nd Fe-B alloys prepared by melt-spinning. X-ray diffraction work indicates that the materials are comprised primarily of a new, tetragonal, rare earth-iron-boron phase. The precise stoichiometry and detailed crystal structure of this phase have been determined by Rietveld analyses of neutron powder diffraction data. The compound is R{sub 2}Fe{sub 14}B, having the P4{sub 2}/mnm space group symmetry. The structure contains puckered, hexagonal nets reminiscent of those characterizing hexagonal R-Co magnetic compounds. Very interestingly, the boron atoms reside at the centers of trigonal prisms, which are fundamental structural units of many transition metal-metalloid systems, both crystalline and amorphous. Relationships between the crystal structure and intrinsic magnetic properties are discussed.

Authors:
 [1]
  1. General Motors Research Laboratories, Warren, MI (USA)
OSTI Identifier:
5442884
Report Number(s):
CONF-840909-
Journal ID: ISSN 0197-1689; CODEN: TMPSA
Resource Type:
Conference
Journal Name:
TMS (The Metallurgical Society) Paper Selection; (USA)
Additional Journal Information:
Journal Volume: 56; Conference: TMS-AIME fall meeting, Detroit, MI (USA), 16-20 Sep 1984; Journal ID: ISSN 0197-1689
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BORON ALLOYS; CRYSTAL STRUCTURE; MAGNETIC PROPERTIES; IRON ALLOYS; NEODYMIUM ALLOYS; HEXAGONAL LATTICES; NEUTRON DIFFRACTION; STOICHIOMETRY; TETRAGONAL LATTICES; X-RAY DIFFRACTION; ALLOYS; COHERENT SCATTERING; CRYSTAL LATTICES; DIFFRACTION; PHYSICAL PROPERTIES; RARE EARTH ALLOYS; SCATTERING; 360102* - Metals & Alloys- Structure & Phase Studies; 360104 - Metals & Alloys- Physical Properties

Citation Formats

Herbst, J F. Structural and magnetic properties of melt-spun rare earth-iron-boron alloys. United States: N. p., Web.
Herbst, J F. Structural and magnetic properties of melt-spun rare earth-iron-boron alloys. United States.
Herbst, J F. . "Structural and magnetic properties of melt-spun rare earth-iron-boron alloys". United States.
@article{osti_5442884,
title = {Structural and magnetic properties of melt-spun rare earth-iron-boron alloys},
author = {Herbst, J F},
abstractNote = {Intrinsic coercivities and energy products as large as 20 kOe and 14 MGOe, respectively, have been observed in Nd Fe-B alloys prepared by melt-spinning. X-ray diffraction work indicates that the materials are comprised primarily of a new, tetragonal, rare earth-iron-boron phase. The precise stoichiometry and detailed crystal structure of this phase have been determined by Rietveld analyses of neutron powder diffraction data. The compound is R{sub 2}Fe{sub 14}B, having the P4{sub 2}/mnm space group symmetry. The structure contains puckered, hexagonal nets reminiscent of those characterizing hexagonal R-Co magnetic compounds. Very interestingly, the boron atoms reside at the centers of trigonal prisms, which are fundamental structural units of many transition metal-metalloid systems, both crystalline and amorphous. Relationships between the crystal structure and intrinsic magnetic properties are discussed.},
doi = {},
url = {https://www.osti.gov/biblio/5442884}, journal = {TMS (The Metallurgical Society) Paper Selection; (USA)},
issn = {0197-1689},
number = ,
volume = 56,
place = {United States},
year = {},
month = {}
}

Conference:
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