Driving higher magnetic field sensitivity of the martensitic transformation in MnCoGe ferromagnet

S. C. Ma; Q. Ge; Y. F. Hu; L. Wang; K. Liu; Q. Z. Jiang; D. H. Wang; C. C. Hu; H. B. Huang; G. P. Cao; Z. C. Zhong; Y. W. Du

doi:10.1063/1.4995644

Driving higher magnetic field sensitivity of the martensitic transformation in MnCoGe ferromagnet

S. C. Ma, Q. Ge, Y. F. Hu, L. Wang, K. Liu, Q. Z. Jiang, D. H. Wang, C. C. Hu, H. B. Huang, G. P. Cao, Z. C. Zhong, Y. W. Du

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24 引用（Scopus）

摘要

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_1-_xCo₁₊_xGe 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_0.965Co_0.035Ge 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.

源语言	英语
文章编号	192406
期刊	Applied Physics Letters
卷	111
期	19
DOI	https://doi.org/10.1063/1.4995644
出版状态	已出版 - 6 11月 2017
已对外发布	是

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title = "Driving higher magnetic field sensitivity of the martensitic transformation in MnCoGe ferromagnet",

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 Mn1-xCo1+xGe 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 Mn0.965Co0.035Ge 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.",

author = "Ma, {S. C.} and Q. Ge and Hu, {Y. F.} and L. Wang and K. Liu and Jiang, {Q. Z.} and Wang, {D. H.} and Hu, {C. C.} and Huang, {H. B.} and Cao, {G. P.} and Zhong, {Z. C.} and Du, {Y. W.}",

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doi = "10.1063/1.4995644",

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AU - Ma, S. C.

AU - Ge, Q.

AU - Hu, Y. F.

AU - Wang, L.

AU - Liu, K.

AU - Jiang, Q. Z.

AU - Wang, D. H.

AU - Hu, C. C.

AU - Huang, H. B.

AU - Cao, G. P.

AU - Zhong, Z. C.

AU - Du, Y. W.

PY - 2017/11/6

Y1 - 2017/11/6

N2 - 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 Mn1-xCo1+xGe 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 Mn0.965Co0.035Ge 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.

AB - 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 Mn1-xCo1+xGe 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 Mn0.965Co0.035Ge 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.

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Driving higher magnetic field sensitivity of the martensitic transformation in MnCoGe ferromagnet

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