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Title: Anomalous behavior of the electrical resistivity of MnSi near the ferromagnetic phase transition

Abstract

The results of measuring the electrical resistivity of a MnSi single crystal near the ferromagnetic phase transition at atmospheric and high pressures are reported. In contrast to the previous works, compressed helium is used as a pressure-transferring medium. It is shown that the temperature derivative of the electrical resistivity has the form of sharp maximum on the phase-transition line over the entire its length. Moreover, the observed maxima have a fine structure exhibiting a pronounced shoulder at temperatures slightly higher (by approximately 0.5 K) than the peak temperature, which indicates the existence of nontrivial fluctuations in the paramagnetic phase of MnSi. This feature disappears at a pressure of about 0.35 GPa, which corresponds to the tricritical-point coordinate.

Authors:
 [1];  [2]; ;  [3]
  1. Russian Academy of Sciences, Institute for High Pressure Physics (Russian Federation)
  2. Los Alamos National Laboratory (United States)
  3. Russian Academy of Sciences, Institute for High Pressure Physics (Russian Federation), E-mail: sergei@hppi.troitsk.ru
Publication Date:
OSTI Identifier:
21072554
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Experimental and Theoretical Physics; Journal Volume: 104; Journal Issue: 1; Other Information: DOI: 10.1134/S1063776107010050; Copyright (c) 2007 Nauka/Interperiodica; Article Copyright (c) 2007 Pleiades Publishing, Inc; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ELECTRIC CONDUCTIVITY; FINE STRUCTURE; HELIUM; MANGANESE SILICIDES; MONOCRYSTALS; PARAMAGNETISM; PHASE TRANSFORMATIONS; PRESSURE DEPENDENCE; PRESSURE RANGE MEGA PA 100-1000

Citation Formats

Petrova, A. E., Bauer, E. D., Krasnorussky, V. N., and Stishov, S. M. Anomalous behavior of the electrical resistivity of MnSi near the ferromagnetic phase transition. United States: N. p., 2007. Web. doi:10.1134/S1063776107010050.
Petrova, A. E., Bauer, E. D., Krasnorussky, V. N., & Stishov, S. M. Anomalous behavior of the electrical resistivity of MnSi near the ferromagnetic phase transition. United States. doi:10.1134/S1063776107010050.
Petrova, A. E., Bauer, E. D., Krasnorussky, V. N., and Stishov, S. M. Thu . "Anomalous behavior of the electrical resistivity of MnSi near the ferromagnetic phase transition". United States. doi:10.1134/S1063776107010050.
@article{osti_21072554,
title = {Anomalous behavior of the electrical resistivity of MnSi near the ferromagnetic phase transition},
author = {Petrova, A. E. and Bauer, E. D. and Krasnorussky, V. N. and Stishov, S. M.},
abstractNote = {The results of measuring the electrical resistivity of a MnSi single crystal near the ferromagnetic phase transition at atmospheric and high pressures are reported. In contrast to the previous works, compressed helium is used as a pressure-transferring medium. It is shown that the temperature derivative of the electrical resistivity has the form of sharp maximum on the phase-transition line over the entire its length. Moreover, the observed maxima have a fine structure exhibiting a pronounced shoulder at temperatures slightly higher (by approximately 0.5 K) than the peak temperature, which indicates the existence of nontrivial fluctuations in the paramagnetic phase of MnSi. This feature disappears at a pressure of about 0.35 GPa, which corresponds to the tricritical-point coordinate.},
doi = {10.1134/S1063776107010050},
journal = {Journal of Experimental and Theoretical Physics},
number = 1,
volume = 104,
place = {United States},
year = {Thu Feb 15 00:00:00 EST 2007},
month = {Thu Feb 15 00:00:00 EST 2007}
}