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Driving higher magnetic field sensitivity of the martensitic transformation in MnCoGe ferromagnet.
- Source :
- Applied Physics Letters; 11/6/2017, Vol. 111 Issue 19, p192406-1-192406-5, 5p, 1 Diagram, 4 Graphs
- Publication Year :
- 2017
-
Abstract
- The sharp metamagnetic martensitic transformation (MMT) triggered by a low critical field plays a pivotal role in magnetoresponsive effects for ferromagnetic shape memory alloys (FSMAs). Here, a sharper magnetic-field-induced metamagnetic martensitic transformation (MFIMMT) is realized in Mn<subscript>1-x</subscript>Co<subscript>1+x</subscript>Ge systems with a giant magnetocaloric effect around room temperature, which represents the lowest magnetic driving and completion fields as well as the largest magnetization difference around MFIMMT reported heretofore in MnCoGe-based FSMAs. More interestingly, a reversible MFIMMT with field cycling is observed in the Mn<subscript>0.965</subscript>Co<subscript>0.035</subscript>Ge compound. These results indicate that the consensus would be broken that the magnetic field is difficult to trigger the MMT for MnCoGe-based systems. The origin of a higher degree of sensitivity of martensitic transformation to the magnetic field is discussed based on the X-ray absorption spectroscopic results. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00036951
- Volume :
- 111
- Issue :
- 19
- Database :
- Complementary Index
- Journal :
- Applied Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 126183259
- Full Text :
- https://doi.org/10.1063/1.4995644