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Title: Order-disorder effects in nitrided Sm-Fe permanent magnets

Abstract

Rapidly solidified Sm{sub 11}Fe{sub 89} was observed to form partially ordered Sm{sub 2}Fe{sub 17}. The ordering increased systematically with annealing temperature, reaching an order parameter of 0.8 after annealing at 950 degree sign C for 15 min. The coercivity of the corresponding interstitial compound Sm{sub 2}Fe{sub 17}N{sub x} varied with annealing temperature and thus order parameter. The coercivity reached a maximum for an order parameter of 0.45-5, then dramatically decreased as the order increased. This behavior is characteristic of demagnetization controlled by domain wall pinning by antiphase boundaries. (c) 2000 American Institute of Physics.

Authors:
 [1];  [1];  [2]
  1. Department of Materials Science and Engineering, University of Utah, Salt Lake City, Utah 84112 (United States)
  2. Idaho National Engineering and Environmental Laboratory, Idaho Falls, Idaho 83415 (United States)
Publication Date:
OSTI Identifier:
20216277
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 87; Journal Issue: 9; Other Information: PBD: 1 May 2000; Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; SAMARIUM ADDITIONS; IRON ALLOYS; PERMANENT MAGNETS; NITRIDATION; ORDER-DISORDER TRANSFORMATIONS; ORDER PARAMETERS; COERCIVE FORCE; ANNEALING; DEMAGNETIZATION; EXPERIMENTAL DATA

Citation Formats

Meacham, B. E., Shield, J. E., and Branagan, D. J. Order-disorder effects in nitrided Sm-Fe permanent magnets. United States: N. p., 2000. Web. doi:10.1063/1.372815.
Meacham, B. E., Shield, J. E., & Branagan, D. J. Order-disorder effects in nitrided Sm-Fe permanent magnets. United States. doi:10.1063/1.372815.
Meacham, B. E., Shield, J. E., and Branagan, D. J. Mon . "Order-disorder effects in nitrided Sm-Fe permanent magnets". United States. doi:10.1063/1.372815.
@article{osti_20216277,
title = {Order-disorder effects in nitrided Sm-Fe permanent magnets},
author = {Meacham, B. E. and Shield, J. E. and Branagan, D. J.},
abstractNote = {Rapidly solidified Sm{sub 11}Fe{sub 89} was observed to form partially ordered Sm{sub 2}Fe{sub 17}. The ordering increased systematically with annealing temperature, reaching an order parameter of 0.8 after annealing at 950 degree sign C for 15 min. The coercivity of the corresponding interstitial compound Sm{sub 2}Fe{sub 17}N{sub x} varied with annealing temperature and thus order parameter. The coercivity reached a maximum for an order parameter of 0.45-5, then dramatically decreased as the order increased. This behavior is characteristic of demagnetization controlled by domain wall pinning by antiphase boundaries. (c) 2000 American Institute of Physics.},
doi = {10.1063/1.372815},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 9,
volume = 87,
place = {United States},
year = {2000},
month = {5}
}