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

Research output: Contribution to journal › Article › peer-review

24 Citations (Scopus)

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_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.

Original language	English
Article number	192406
Journal	Applied Physics Letters
Volume	111
Issue number	19
DOIs	https://doi.org/10.1063/1.4995644
Publication status	Published - 6 Nov 2017
Externally published	Yes

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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.}",

note = "Publisher Copyright: {\textcopyright} 2017 Author(s).",

year = "2017",

month = nov,

day = "6",

doi = "10.1063/1.4995644",

language = "English",

volume = "111",

journal = "Applied Physics Letters",

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T1 - Driving higher magnetic field sensitivity of the martensitic transformation in MnCoGe ferromagnet

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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DO - 10.1063/1.4995644

M3 - Article

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SN - 0003-6951

VL - 111

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 19

M1 - 192406

ER -

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

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