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Correlation of Microstructure with Hard Magnetic Properties of Glass-Coated MnBi Microwires

Published online by Cambridge University Press:  02 January 2019

J. Zamora ,
I. Betancourt ,
A. Jiménez ,
R. Pérez del Real  and
M. Vázquez
J. Zamora*
Affiliation:
Departamento de Materiales Metálicos y Cerámicos, Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Ciudad de México, CP 04510. Mexico. Instituto de Ciencia de Materiales de Madrid, CSIC, Sor Juana Inés de la Cruz 3, 28049Madrid, Spain.
I. Betancourt
Affiliation:
Departamento de Materiales Metálicos y Cerámicos, Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Ciudad de México, CP 04510. Mexico.
A. Jiménez
Affiliation:
Instituto de Ciencia de Materiales de Madrid, CSIC, Sor Juana Inés de la Cruz 3, 28049Madrid, Spain.
R. Pérez del Real
Affiliation:
Instituto de Ciencia de Materiales de Madrid, CSIC, Sor Juana Inés de la Cruz 3, 28049Madrid, Spain.
M. Vázquez
Affiliation:
Instituto de Ciencia de Materiales de Madrid, CSIC, Sor Juana Inés de la Cruz 3, 28049Madrid, Spain.
*
*Corresponding author. E-mail: [email protected]
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Abstract

In this work, we study the hard-magnetic properties and its influence on the microstructure of MnBi-based glass-coated microwires obtained by Taylor-Ulitovsky process, as well as their magnetic and thermal dependence in the range of 200 K-360 K. We obtained glass-coated microwires pieces trough of the Taylor-Ulitovsky process. Glass-coated microwires exhibited the formation of Low-Temperature Intermetallic Phase (LTIP)-MnBi, as confirmed by scanning electron microscopy (SEM). Energy Dispersive Spectroscopy (EDS) elemental chemical composition analysis showed LTIP regions interspersed within Bi- and Mn-rich areas. Magnetic properties were determined by vibrating sample magnetometry (VSM), for which a considerable intrinsic coercivity field (iHc) up to 6000 Oe at 360 K, together with a saturation magnetization (Ms) of 57.49 emu/cm3. Therefore, this combination of properties renders LTIP is a promising precursor with potential for applications at high temperatures.

Keywords

alloyferromagneticmagnetic properties
Type
Articles
Information
MRS Advances , Volume 3 , Issue 62: International Materials Research Congress XXVII , 2018 , pp. 3635 - 3640
Copyright
Copyright © Materials Research Society 2018 

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