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Title: Pressure effects on antiferromagnetism in UNiAl

Abstract

The temperature dependencies of the electrical resistivity {rho} for current along and perpendicular to the c axis were measured on single crystalline UNiAl under various hydrostatic pressures. The {rho}(T) curves at ambient pressure exhibit a Cr anomaly around the Neel temperature T{sub N}. Application of pressure causes a reduction of T{sub N} value. Linear extrapolation of low-pressure T{sub N} vs p data yields an estimate of a critical pressure for antiferromagnetism p{sub c}{approx_equal}10 GPa. Measurements above 1 GPa, however, reveal a collapse of the antiferromagnetic (AF) ordering already below 3 GPa, although AF correlations seem to affect resistivity behavior {rho}(T) in pressures up to 8 GPa. A sudden change of the {rho}(T) curve character for i(perpendicular sign)c and T<T{sub N} indicates a pressure-induced change of magnetic ordering or fluctuations within the basal plane. The results are discussed in terms of the instability of the itinerant 5f-electron antiferromagnetism in UNiAl. (c) 2000 American Institute of Physics.

Authors:
 [1];  [1];  [2];  [3];  [3];  [4];  [4];  [5];  [6];  [7]
  1. Institute of Physics, ASCR, 1622 53 Prague 6, The Czech Republic (Czech Republic)
  2. National High Magnetic Field Laboratory, Pulse Field Facility, LANL, MS E536, Los Alamos, New Mexico 87545 (United States)
  3. Department of Quantum Matter, Hiroshima University, Higashi-Hiroshima 739-8526, (Japan)
  4. Department of Electronic Structures, Charles University, 12116 Prague 2, The Czech Republic (Czech Republic)
  5. Physics Department, New Mexico State University, Las Cruces, New Mexico 88003 (United States)
  6. Department of Physics, University of California, Riverside, California 92521-0413 (United States)
  7. Van der Waals-Zeeman Institute, University of Amsterdam, 1018 XE Amsterdam, The Netherlands (Netherlands)
Publication Date:
OSTI Identifier:
20216228
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; URANIUM ALLOYS; NICKEL ALLOYS; ALUMINIUM ALLOYS; ELECTRIC CONDUCTIVITY; TEMPERATURE DEPENDENCE; PRESSURE DEPENDENCE; ANTIFERROMAGNETISM; NEEL TEMPERATURE; VERY HIGH PRESSURE; EXPERIMENTAL DATA

Citation Formats

Mikulina, O., Kamarad, J., Lacerda, A., Syshchenko, O., Fujita, T., Prokes, K., Sechovsky, V., Nakotte, H., Beyerman, W., and Menovsky, A. A. Pressure effects on antiferromagnetism in UNiAl. United States: N. p., 2000. Web. doi:10.1063/1.373279.
Mikulina, O., Kamarad, J., Lacerda, A., Syshchenko, O., Fujita, T., Prokes, K., Sechovsky, V., Nakotte, H., Beyerman, W., & Menovsky, A. A. Pressure effects on antiferromagnetism in UNiAl. United States. doi:10.1063/1.373279.
Mikulina, O., Kamarad, J., Lacerda, A., Syshchenko, O., Fujita, T., Prokes, K., Sechovsky, V., Nakotte, H., Beyerman, W., and Menovsky, A. A. Mon . "Pressure effects on antiferromagnetism in UNiAl". United States. doi:10.1063/1.373279.
@article{osti_20216228,
title = {Pressure effects on antiferromagnetism in UNiAl},
author = {Mikulina, O. and Kamarad, J. and Lacerda, A. and Syshchenko, O. and Fujita, T. and Prokes, K. and Sechovsky, V. and Nakotte, H. and Beyerman, W. and Menovsky, A. A.},
abstractNote = {The temperature dependencies of the electrical resistivity {rho} for current along and perpendicular to the c axis were measured on single crystalline UNiAl under various hydrostatic pressures. The {rho}(T) curves at ambient pressure exhibit a Cr anomaly around the Neel temperature T{sub N}. Application of pressure causes a reduction of T{sub N} value. Linear extrapolation of low-pressure T{sub N} vs p data yields an estimate of a critical pressure for antiferromagnetism p{sub c}{approx_equal}10 GPa. Measurements above 1 GPa, however, reveal a collapse of the antiferromagnetic (AF) ordering already below 3 GPa, although AF correlations seem to affect resistivity behavior {rho}(T) in pressures up to 8 GPa. A sudden change of the {rho}(T) curve character for i(perpendicular sign)c and T<T{sub N} indicates a pressure-induced change of magnetic ordering or fluctuations within the basal plane. The results are discussed in terms of the instability of the itinerant 5f-electron antiferromagnetism in UNiAl. (c) 2000 American Institute of Physics.},
doi = {10.1063/1.373279},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 9,
volume = 87,
place = {United States},
year = {2000},
month = {5}
}