Temperature Dependent Magnetic and Structural Properties of Ni-Mn-Ga Heusler Alloy Glass-Coated Microwires

• Authors: S. Shevyrtalov , K. Chichay , P. Ershov , V. Khovaylo , A. Zhukov , V. Zhukova , V. Rodionova
• Languages of publication: EN

Abstracts

EN

We report on structural and magnetic properties of glass-coated microwires of Ni-Mn-Ga-based Heusler alloys. Structural characterization of the as-prepared microwires revealed that they have a cubic structure at room temperature. It is shown that magnetic properties of microwires can be tailored by heat treatment as well as by removing the glass coating. Specifically, annealing of the microwires has a marked influence of the Curie temperature T_{C} which increases significatly in the heat-treated samples. Release of internal stresses in the microwires by removing the glass coating causes magnetization and the Curie temperature to decrease. This allowed us to conclude that in the studied microwires the magnetostriction constant is positive and estimate the value of internal stresses as being roughly equal to 1.5 GPa.

Keywords

EN

75.47.Np; 75.60.Ej; 75.60.Nt

Discipline

• 75.47.Np: Metals and alloys
• 75.60.Nt: Magnetic annealing and temperature-hysteresis effects
• 75.60.Ej: Magnetization curves, hysteresis, Barkhausen and related effects(for hysteresis in ferroelectricity, see 77.80.Dj)

• Journal: Acta Physica Polonica A
• Year: 2015
• Volume: 127
• Issue: 2
• Pages: 603-605

Dates

published

2015-02

Contributors

author

S. Shevyrtalov

• Innovation Park and Institute of Physics and Technology, Immanuel Kant Baltic Federal University, Kaliningrad 236041, Russia

author

K. Chichay

• Innovation Park and Institute of Physics and Technology, Immanuel Kant Baltic Federal University, Kaliningrad 236041, Russia

author

P. Ershov

• Innovation Park and Institute of Physics and Technology, Immanuel Kant Baltic Federal University, Kaliningrad 236041, Russia

author

V. Khovaylo

• National University of Science and Technology MISiS, Moscow 119049, Russia
• ITMO University, St. Petersburg 197101, Russia

author

A. Zhukov

• Dpto. Fisica de Materiales, Fac. Quimicas, sUPV/EHU, 20009 San Sebastian, Spain
• IKERBASQUE, Basque Foundation for Science, 48011 Bilbao, Spain

author

V. Zhukova

• Dpto. Fisica de Materiales, Fac. Quimicas, sUPV/EHU, 20009 San Sebastian, Spain

author

V. Rodionova

• Innovation Park and Institute of Physics and Technology, Immanuel Kant Baltic Federal University, Kaliningrad 236041, Russia
• National University of Science and Technology MISiS, Moscow 119049, Russia

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Identifiers

DOI

10.12693/APhysPolA.127.603