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The Neel temperatures of nanocrystalline chromium
Author(s) -
Michael Fitzsimmons,
R. A. Robinson,
J. A. Eastman,
J. W. Lynn
Publication year - 1994
Language(s) - English
Resource type - Reports
DOI - 10.2172/197835
Subject(s) - nanocrystalline material , antiferromagnetism , chromium , néel temperature , grain size , neutron diffraction , materials science , condensed matter physics , crystallography , magnetization , metallurgy , chemistry , crystal structure , nanotechnology , physics , magnetic field , quantum mechanics
Wide-angle neutron diffraction measurements at temperatures from 6 to 250 K indicate that the major portion of a nanocrystalline chromium sample with a mean grain size of 73 nm becomes antiferromagnetically ordered at 119 {plus_minus} 10 K. The remainder of the sample has a Neel temperature above 250 K, as expected for coarse-grained chromium. No evidence for antiferromagnetic order in a second sample with a mean grain size of 11 nm was observed, even to temperatures as low as 6 K

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