Next Article in Journal
Mechanical Properties of Metallic Glasses
Next Article in Special Issue
Magnetic Moment of Cu-Modified Ni2MnGa Magnetic Shape Memory Alloys
Previous Article in Journal
Synthesis and Characterization of NanocrystallineMg-7.4%Al Powders Produced by Mechanical Alloying
Metals 2013, 3(1), 69-76; doi:10.3390/met3010069
Article

Exchange Bias and Inverse Magnetocaloric Effect in Co and Mn Co-Doped Ni2MnGa Shape Memory Alloy

 and
*
School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
* Author to whom correspondence should be addressed.
Received: 13 December 2012 / Revised: 8 January 2013 / Accepted: 17 January 2013 / Published: 25 January 2013
(This article belongs to the Special Issue Shape Memory Alloys)
View Full-Text   |   Download PDF [323 KB, 25 January 2013; original version 25 January 2013]   |   Browse Figures
SciFeed

Abstract

Exchange bias effect observed in the Ni1.68Co0.32Mn1.20Ga0.80 alloy confirms the coexistence of antiferromagnetic and ferromagnetic phases in the martensite phase. A large inverse magnetocaloric effect has been observed within the martensitic transformation temperature range, which is originated from modified magnetic order through magnetic-field-induced phase transformation from partially antiferromagnetic martensite to ferromagnetic austenite. The magnetic entropy change is 16.2 J kg−1 K−1 at 232 K under ΔH = 60 kOe, with the net refrigerant capacity of 68 J kg−1. These properties indicate Co and Mn co-doped Ni2MnGa alloy is a multifunctional material potentially suitable for magnetic refrigeration and spintronics applications.
Keywords: shape memory alloy; exchange bias; inverse magnetocaloric effect; Ni-Mn-Ga; martensitic transformation shape memory alloy; exchange bias; inverse magnetocaloric effect; Ni-Mn-Ga; martensitic transformation
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

Share & Cite This Article

Further Mendeley | CiteULike
Export to BibTeX |
EndNote |
RIS
MDPI and ACS Style

Wang, B.; Liu, Y. Exchange Bias and Inverse Magnetocaloric Effect in Co and Mn Co-Doped Ni2MnGa Shape Memory Alloy. Metals 2013, 3, 69-76.

View more citation formats

Related Articles

Article Metrics

For more information on the journal, click here

Comments

[Return to top]
Metals EISSN 2075-4701 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert