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Title: The role of a critical distance in RMn{sub 2} compounds

Abstract

In the RMn{sub 2} system, the antiferromagnetically ordered Mn moments are reported to disappear at a reduction of the Mn-Mn distance, either by applying external pressure or by alloying. The authors illustrate the phenomena for the hexagonal NdMn{sub 2} compound. The Neel temperature in the (Nd,Lu)Mn{sub 2} system is found to vanish at substitution of 30% of Nd by Lu, considered to be equivalent to applying a pressure of 24.5kbar. Antiferromagnetic order of the Mn sublattice, however, vanishes already at substitution of 7% of Mn by Cu and of 3% of Mn by Fe in the NdMn{sub 2}, being equivalent to an external pressure of only 4kbar. High-pressure studies on the Nd(Mn,Cu){sub 2} system show that the effect of an external pressure on the Neel temperature decreases markedly with increasing Cu concentration, in contrast to what is expected in a critical distance model.

Authors:
; ;  [1]
  1. Univ. van Amsterdam (Netherlands). Van der Walls-Zeeman Lab.
Publication Date:
OSTI Identifier:
40207
Report Number(s):
CONF-930860-
Journal ID: IEMGAQ; ISSN 0018-9464; TRN: IM9520%%402
Resource Type:
Journal Article
Journal Name:
IEEE Transactions on Magnetics
Additional Journal Information:
Journal Volume: 30; Journal Issue: 2Pt2; Conference: EMMA `93: 5th European magnetic materials and applications conference, Kosice (Slovakia), 24-27 Aug 1993; Other Information: PBD: Mar 1994
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; MANGANESE ALLOYS; CRYSTAL STRUCTURE; MAGNETIC PROPERTIES; NEODYMIUM ALLOYS; LUTETIUM ALLOYS; MAGNETIC MOMENTS; INTERMETALLIC COMPOUNDS; ORDER PARAMETERS; PRESSURE DEPENDENCE; CRYSTAL LATTICES; INTERATOMIC DISTANCES

Citation Formats

Kim-Ngan, N.H., Brommer, P.E., and Franse, J.J.M. The role of a critical distance in RMn{sub 2} compounds. United States: N. p., 1994. Web. doi:10.1109/20.312249.
Kim-Ngan, N.H., Brommer, P.E., & Franse, J.J.M. The role of a critical distance in RMn{sub 2} compounds. United States. doi:10.1109/20.312249.
Kim-Ngan, N.H., Brommer, P.E., and Franse, J.J.M. Tue . "The role of a critical distance in RMn{sub 2} compounds". United States. doi:10.1109/20.312249.
@article{osti_40207,
title = {The role of a critical distance in RMn{sub 2} compounds},
author = {Kim-Ngan, N.H. and Brommer, P.E. and Franse, J.J.M.},
abstractNote = {In the RMn{sub 2} system, the antiferromagnetically ordered Mn moments are reported to disappear at a reduction of the Mn-Mn distance, either by applying external pressure or by alloying. The authors illustrate the phenomena for the hexagonal NdMn{sub 2} compound. The Neel temperature in the (Nd,Lu)Mn{sub 2} system is found to vanish at substitution of 30% of Nd by Lu, considered to be equivalent to applying a pressure of 24.5kbar. Antiferromagnetic order of the Mn sublattice, however, vanishes already at substitution of 7% of Mn by Cu and of 3% of Mn by Fe in the NdMn{sub 2}, being equivalent to an external pressure of only 4kbar. High-pressure studies on the Nd(Mn,Cu){sub 2} system show that the effect of an external pressure on the Neel temperature decreases markedly with increasing Cu concentration, in contrast to what is expected in a critical distance model.},
doi = {10.1109/20.312249},
journal = {IEEE Transactions on Magnetics},
number = 2Pt2,
volume = 30,
place = {United States},
year = {1994},
month = {3}
}