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Research Article | Open Access

Magnetic properties of glass-ceramics obtained by crystallization of iron-rich borosilicate glasses

V. SANDUa( ), E. CIMPOIASUb, A. KUNCSERa,c, M. S. NICOLESCUa
National Institute of Materials Physics, Bucharest Magurele, 077125, Romania
Department of Physics, US Naval Academy, Annapolis, MD, USA
Faculty of Physics, Bucharest University, Bucharest-Magurele, 077125, Romania
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Abstract

The specific dynamic magnetic response and magnetic relaxation phenomena in magnetite-based glass-ceramics by controlled crystallization of Fe-rich borosilicate glasses with 25 wt% Fe2O3, in the presence of two types of nucleating agents, Cr2O3 and P2O5, were investigated. The magnetic response is complex and shows contributions arising from two subsystems: a system with collective characteristics, superspin-glass like, and another one with single particle characteristics (superparamagnetic) with dipolar interaction. The nucleating agents have strong influence on the characteristic temperatures and anisotropy energy.

Keywords

magnetiteglass-ceramicsAC susceptibilitymagnetic relaxationnucleating agent

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Journal of Advanced Ceramics
Volume 6 Issue 3,
September 2017
Pages 251-261
DOI: 10.1007/s40145-017-0236-2

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SANDU V, CIMPOIASU E, KUNCSER A, et al. Magnetic properties of glass-ceramics obtained by crystallization of iron-rich borosilicate glasses. Journal of Advanced Ceramics, 2017, 6(3): 251-261. https://doi.org/10.1007/s40145-017-0236-2

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Received: 01 February 2017
Revised: 25 April 2017
Accepted: 07 June 2017
Published: 29 September 2017
© The author(s) 2017

Open Access The articles published in this journal are distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons. org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.