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@article{1638237,
author = {Kamarad, J. and Friák, Martin and Kastil, J. and Schneeweiss, O. and Šob, Mojmír and Dlouhy, A.},
article_location = {Amsterdam},
article_number = {OCT 1 2019},
doi = {http://dx.doi.org/10.1016/j.jmmm.2019.165333},
keywords = {High entropy alloy; CrMnFeCoNi; Magnetization; High pressure},
language = {eng},
issn = {0304-8853},
journal = {Journal of Magnetism and Magnetic Materials},
title = {Effect of high pressure on magnetic properties of CrMnFeCoNi high entropy alloy},
url = {https://www.sciencedirect.com/science/article/pii/S0304885319313666},
volume = {487},
year = {2019}
}
TY - JOUR
ID - 1638237
AU - Kamarad, J. - Friák, Martin - Kastil, J. - Schneeweiss, O. - Šob, Mojmír - Dlouhy, A.
PY - 2019
TI - Effect of high pressure on magnetic properties of CrMnFeCoNi high entropy alloy
JF - Journal of Magnetism and Magnetic Materials
VL - 487
IS - OCT 1 2019
SP - 1-9
EP - 1-9
PB - Elsevier
SN - 03048853
KW - High entropy alloy
KW - CrMnFeCoNi
KW - Magnetization
KW - High pressure
UR - https://www.sciencedirect.com/science/article/pii/S0304885319313666
L2 - https://www.sciencedirect.com/science/article/pii/S0304885319313666
N2 - The temperature and magnetic field dependences of magnetization of the Cantor CrMnFeCoNi alloy were studied at ambient and high (up to 1 GPa) external pressure. The low-temperature spin-glass-like behavior and the paramagnetic behavior at temperatures above 100 K with effective paramagnetic moment of the alloy, m(eff )= 2.71 mu(B)/f.u., were observed. A negative value of the paramagnetic Curie temperature, theta(c) = - 210 K, was found that confirms a presence of strong antiferromagnetic interactions of moments in the alloy. A model of the magnetic clusters with the effective moment of m(cl) = 0.275 mu(B)/f.u. provides a possibility to describe qualitatively the pronounced difference between the pressure-induced decrease of magnetization of the ZFC and the FC alloys, dlnM/dP(5 K) = - 15.5*10(-3) GPa(-1) and - 39.2*10(-3) GPa(-1), respectively. The former value is in an excellent agreement with the value of - 16*10(-3) GPa(-1) obtained from our quantum-mechanical calculations. The negative pressure shift of the ordering temperature of the alloy, dT(ord)/dP = - 9 K/GPa, and the pressure-induced decrease of magnetization of the alloy in paramagnetic state, dlnM/dP(90 K) = -70*10(-3) GPa(-1), indicate a possible itinerant character of magnetism of the alloy. The results of theoretical calculations of the total moment of the CrMnFeCoNi fcc-alloy are discussed.
ER -
KAMARAD, J., Martin FRIÁK, J. KASTIL, O. SCHNEEWEISS, Mojmír ŠOB a A. DLOUHY. Effect of high pressure on magnetic properties of CrMnFeCoNi high entropy alloy. \textit{Journal of Magnetism and Magnetic Materials}. Amsterdam: Elsevier, 2019, roč.~487, OCT 1 2019, s.~1-9. ISSN~0304-8853. Dostupné z: https://dx.doi.org/10.1016/j.jmmm.2019.165333.
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