First-order magnetostructural transformation in Fe doped Mn-Co-Ge alloys

Zilong Wang; Zhihua Nie; Junxi Zeng; Ru Su; Yuepeng Zhang; Dennis E. Brown; Yang Ren; Yandong Wang

doi:10.1016/j.jallcom.2013.05.205

First-order magnetostructural transformation in Fe doped Mn-Co-Ge alloys

Zilong Wang, Zhihua Nie, Junxi Zeng, Ru Su, Yuepeng Zhang, Dennis E. Brown, Yang Ren, Yandong Wang^*

^*Corresponding author for this work

School of Material Science and Engineering

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

34 Citations (Scopus)

Abstract

Substitution of Fe for Mn atoms in Mn-Co-Ge alloys was employed for tailoring concurrent structural and magnetic phase transitions. First-order magnetostructural transition from paramagnetic hexagonal Ni₂In-type parent phase to ferromagnetic orthorhombic TiNiSi-type martensite was achieved. A giant magnetocaloric effect of AS_m = -9.74 J kg¹ K ¹ was obtained under magnetic field change of 5 T in the vicinity of phase transition temperature. This result indicates that Fe doped Mn-Co-Ge alloys are ideal candidates for magnetic refrigeration applications. Furthermore, the magnetic field-induced martensitic transformation, associated with a large lattice strain of ∼12%, was directly evidenced by in situ synchrotron high-energy X-ray diffraction.

Original language	English
Pages (from-to)	486-490
Number of pages	5
Journal	Journal of Alloys and Compounds
Volume	577
DOIs	https://doi.org/10.1016/j.jallcom.2013.05.205
Publication status	Published - 2013

Keywords

First-order magnetostructural
Magnetocaloric effect
Mn-Co-Ge alloys
Transformation
X-ray diffraction

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10.1016/j.jallcom.2013.05.205

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title = "First-order magnetostructural transformation in Fe doped Mn-Co-Ge alloys",

abstract = "Substitution of Fe for Mn atoms in Mn-Co-Ge alloys was employed for tailoring concurrent structural and magnetic phase transitions. First-order magnetostructural transition from paramagnetic hexagonal Ni2In-type parent phase to ferromagnetic orthorhombic TiNiSi-type martensite was achieved. A giant magnetocaloric effect of ASm = -9.74 J kg1 K 1 was obtained under magnetic field change of 5 T in the vicinity of phase transition temperature. This result indicates that Fe doped Mn-Co-Ge alloys are ideal candidates for magnetic refrigeration applications. Furthermore, the magnetic field-induced martensitic transformation, associated with a large lattice strain of ∼12%, was directly evidenced by in situ synchrotron high-energy X-ray diffraction.",

keywords = "First-order magnetostructural, Magnetocaloric effect, Mn-Co-Ge alloys, Transformation, X-ray diffraction",

author = "Zilong Wang and Zhihua Nie and Junxi Zeng and Ru Su and Yuepeng Zhang and Brown, {Dennis E.} and Yang Ren and Yandong Wang",

year = "2013",

doi = "10.1016/j.jallcom.2013.05.205",

language = "English",

volume = "577",

pages = "486--490",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - First-order magnetostructural transformation in Fe doped Mn-Co-Ge alloys

AU - Wang, Zilong

AU - Nie, Zhihua

AU - Zeng, Junxi

AU - Su, Ru

AU - Zhang, Yuepeng

AU - Brown, Dennis E.

AU - Ren, Yang

AU - Wang, Yandong

PY - 2013

Y1 - 2013

N2 - Substitution of Fe for Mn atoms in Mn-Co-Ge alloys was employed for tailoring concurrent structural and magnetic phase transitions. First-order magnetostructural transition from paramagnetic hexagonal Ni2In-type parent phase to ferromagnetic orthorhombic TiNiSi-type martensite was achieved. A giant magnetocaloric effect of ASm = -9.74 J kg1 K 1 was obtained under magnetic field change of 5 T in the vicinity of phase transition temperature. This result indicates that Fe doped Mn-Co-Ge alloys are ideal candidates for magnetic refrigeration applications. Furthermore, the magnetic field-induced martensitic transformation, associated with a large lattice strain of ∼12%, was directly evidenced by in situ synchrotron high-energy X-ray diffraction.

AB - Substitution of Fe for Mn atoms in Mn-Co-Ge alloys was employed for tailoring concurrent structural and magnetic phase transitions. First-order magnetostructural transition from paramagnetic hexagonal Ni2In-type parent phase to ferromagnetic orthorhombic TiNiSi-type martensite was achieved. A giant magnetocaloric effect of ASm = -9.74 J kg1 K 1 was obtained under magnetic field change of 5 T in the vicinity of phase transition temperature. This result indicates that Fe doped Mn-Co-Ge alloys are ideal candidates for magnetic refrigeration applications. Furthermore, the magnetic field-induced martensitic transformation, associated with a large lattice strain of ∼12%, was directly evidenced by in situ synchrotron high-energy X-ray diffraction.

KW - First-order magnetostructural

KW - Magnetocaloric effect

KW - Mn-Co-Ge alloys

KW - Transformation

KW - X-ray diffraction

UR - http://www.scopus.com/inward/record.url?scp=84884388010&partnerID=8YFLogxK

U2 - 10.1016/j.jallcom.2013.05.205

DO - 10.1016/j.jallcom.2013.05.205

M3 - Article

AN - SCOPUS:84884388010

SN - 0925-8388

VL - 577

SP - 486

EP - 490

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -

First-order magnetostructural transformation in Fe doped Mn-Co-Ge alloys

Abstract

Keywords

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