Strain Control of Phase Transition and Exchange Bias in Flexible Heusler Alloy Thin Films
Source abstract
Abstract
The practical applications for the distinctive functions of metamagnetic Heusler alloys, such as magnetic shape memory effect, various caloric effects, etc., strongly depend on the phase transition temperatures. Here, flexible Heusler alloy Ni-Mn-Sn films have been deposited on mica substrates by pulsed laser deposition with a Ti buffer layer. Clear ferromagnetic (FM) transition followed by the martensitic transformation at around room temperature and exchange bias (EB) with a blocking temperature of 70 K are observed. Under the application of both tensile and compressive strains by bending the mica substrates, all the characteristic temperatures of Ni-Mn-Sn films, including the FM transition temperature, martensitic transformation temperature, and blocking temperature of EB, are significantly increased by about 10 K. Furthermore, EB field and coercivity are both strongly strengthened, which is mainly caused by the simultaneous enhancement of FM and anti-FM Mn-Mn coupling because of their shortened separations by strain and verified by the Monte Carlo simulation results. The strain controlling for structural and magnetic properties provides efficient manipulation for Heusler alloy-based magnetic devices.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Shape Memory Alloy Transformations · Heusler alloys: electronic and magnetic properties · Magnetic and transport properties of perovskites and related materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Physics, Southeast University, Nanjing 211189, China
Department of Physics, College of Sciences, Northeastern University, Shenyang 110819, China
Department of Physics, Changshu Institute of Technology, Changshu 215500, China
National Laboratory of Solid State Microstructures, Department of Materials Science and Engineering, Jiangsu Key Laboratory for Artificial Functional Materials, Nanjing University, Nanjing 210093, China
Department of Physics, Nanjing University, Nanjing 210093, China
National Laboratory of Solid State Microstructures, Nanjing 210008, China
Funding
Ministry of Education of the People's Republic of China · Ministry of Science and Technology of the People's Republic of China · Natural Science Foundation of Jiangsu Province · National Natural Science Foundation of China · Joint Research Fund Liaoning-Shenyang National Laboratory for Materials Science · Key Laboratory of MEMS of Ministry of Education, Southeast University
References (70)
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