Manipulation of magnetostructural transition and realization of prominent multifunctional magnetoresponsive properties in NiCoMnIn alloys

X. M. Sun, D. Y. Cong, Z. Li, Y. L. Zhang, Z. Chen, Y. Ren, K.-D. Liss, Z. Y. Ma, R. G. Li, Y. H. Qu, Z. Yang, L. Wang, and Y. D. Wang

Phys. Rev. Materials 3, 034404 – Published 11 March 2019

Abstract

Promising multifunctional magnetoresponsive effects such as magnetoresistance, magnetostrain, and the magnetocaloric effect have recently been extensively studied in Ni-Mn-based metamagnetic shape memory alloys, but large reversible magnetoresponsive effects are usually obtained under high magnetic fields, which is an obstacle for practical applications. Here, through manipulating magnetostructural transition, we achieved large reversible magnetoresponsive effects under a relatively low magnetic field of 3 T in a Ni-Co-Mn-In alloy. By systematically tuning the Mn/In ratio and Co substitution, an optimum composition ${Ni}_{49} {Co}_{3} {Mn}_{34} {In}_{14}$ with a low thermal hysteresis (8 K), a narrow transformation interval (7 K) and a high sensitivity of transformation temperature to field change ( $6 K T^{- 1}$ ), was obtained. Good geometric compatibility between austenite and martensite was revealed by in situ synchrotron high-energy x-ray diffraction experiment, which accounts for the low hysteresis and narrow transformation interval. A reversible transformation between pure austenite and pure martensite is induced by a relatively low field of 3 T, which was directly evidenced by in situ neutron diffraction experiments. As a result, a large reversible magnetocaloric effect with entropy change of $16.5 J k g^{- 1} K^{- 1}$ , a large reversible magnetostrain of 0.26%, and a large reversible magnetoresistance of 60%, under a relatively low field of 3 T, were simultaneously achieved. These reversible magnetoresponsive effects are comparable to the maximum reversible values obtained under high fields in other Ni-Mn-based alloys, but the magnetic field we applied is much lower. This study may guide the design of metamagnetic shape memory alloys with low-field-induced magnetoresponsive properties for magnetic refrigeration, magnetic sensing, and magnetic recording applications.

5 More

Received 23 October 2018

DOI:https://doi.org/10.1103/PhysRevMaterials.3.034404

Physics Subject Headings (PhySH)

Magnetic phase transitions Magnetocaloric effect Martensitic phase transition Shape-memory materials

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

X. M. Sun¹, D. Y. Cong^1,*, Z. Li², Y. L. Zhang², Z. Chen¹, Y. Ren³, K.-D. Liss^4,5, Z. Y. Ma⁶, R. G. Li¹, Y. H. Qu¹, Z. Yang¹, L. Wang⁷, and Y. D. Wang¹

¹Beijing Advanced Innovation Center for Materials Genome Engineering, State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China
²Center for Magnetic Materials and Devices & Key Laboratory for Advanced Functional and Low Dimensional Materials of Yunnan Higher Education Institute, Qujing Normal University, Qujing 655011, China
³X-ray Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
⁴Australian Nuclear Science and Technology Organisation, Lucas Heights, New South Wales 2234, Australia
⁵Guangdong Technion-Israel Institute of Technology, Shantou 515063, China
⁶State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
⁷School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China