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Anomalous low temperature stair like coercivity decrease due to magnetostatic coupling between superconducting and ferromagnetic particles in mixed powders

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Marín Palacios, Pilar and Aragon, A.M and Lieblich, M. and Garcia Escorial, A. and Crespo del Arco, Patricia and Hernando Grande, Antonio (2012) Anomalous low temperature stair like coercivity decrease due to magnetostatic coupling between superconducting and ferromagnetic particles in mixed powders. Journal of applied physics, 112 (1). ISSN 0021-8979

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Official URL: http://dx.doi.org/10.1063/1.4733558


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Abstract

Magnetization curves of mixed Nb and FeSi based micrometric particles have been analyzed. The influence of the dispersion of Nb particles on the mixture remanence and coercivity has been studied above and below the Nb superconducting critical temperature. The hysteresis loop shows, at 5K and low applied fields, a decrease of both remanence and coercivity with respect to the one of pure ferromagnetic powders as well as a stair like profile. These features are explained as a consequence of the diamagnetic hysteresis loop of Nb giving rise to local stray fields acting on the ferromagnetic particles at its nearest neighboring.


Item Type:Article
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©2012 American Institute of Physics.

This work has been supported by the MEC of Spain (Consolider-Ingenio 2010 Contract Nos. CSD2007-0010 and MAT2009-14741-C02-01), S2009 MAT 1726, and Project Nos. TSI-020100- 2011-280 and IPT-2011-0893-42000.

Uncontrolled Keywords:Magnetization; Transitions
Subjects:Sciences > Physics > Materials
ID Code:41636
Deposited On:10 Mar 2017 15:14
Last Modified:14 Feb 2018 14:31

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