Martensitic transformation and phase diagram in ternary Co-V-Ga Heusler alloys

Xiao Xu; Akihide Nagashima; Makoto Nagasako; Toshihiro Omori; Takeshi Kanomata; Ryosuke Kainuma

doi:10.1063/1.4978878

Martensitic transformation and phase diagram in ternary Co-V-Ga Heusler alloys

Xiao Xu, Akihide Nagashima, Makoto Nagasako, Toshihiro Omori, Takeshi Kanomata, Ryosuke Kainuma

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

31 Citations (Scopus)

Abstract

We report the martensitic transformation behavior in Co-V-Ga Heusler alloys. Thermoanalysis and thermomagnetization measurements were conducted to observe the martensitic transformation. By using a transmission electron microscope and an in situ X-ray diffractometer, martensitic transformation was found to occur from the L2₁ Heusler parent phase to the D0₂₂ martensite phase. Phase diagrams were determined for two pseudo-binary sections where martensitic transformation was detected. Magnetic properties, including the Curie temperatures and spontaneous magnetization of the parent phase, were also investigated. The magnetic properties showing behaviors different from those of NiMn-based alloys were found.

Original language	English
Article number	121906
Journal	Applied Physics Letters
Volume	110
Issue number	12
DOIs	https://doi.org/10.1063/1.4978878
Publication status	Published - 2017 Mar 20

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title = "Martensitic transformation and phase diagram in ternary Co-V-Ga Heusler alloys",

abstract = "We report the martensitic transformation behavior in Co-V-Ga Heusler alloys. Thermoanalysis and thermomagnetization measurements were conducted to observe the martensitic transformation. By using a transmission electron microscope and an in situ X-ray diffractometer, martensitic transformation was found to occur from the L21 Heusler parent phase to the D022 martensite phase. Phase diagrams were determined for two pseudo-binary sections where martensitic transformation was detected. Magnetic properties, including the Curie temperatures and spontaneous magnetization of the parent phase, were also investigated. The magnetic properties showing behaviors different from those of NiMn-based alloys were found.",

author = "Xiao Xu and Akihide Nagashima and Makoto Nagasako and Toshihiro Omori and Takeshi Kanomata and Ryosuke Kainuma",

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AU - Xu, Xiao

AU - Nagashima, Akihide

AU - Nagasako, Makoto

AU - Omori, Toshihiro

AU - Kanomata, Takeshi

AU - Kainuma, Ryosuke

N1 - Funding Information: This study was supported by Grant-in-Aid for Research Activity Start-up (No. 16H06632) from the Japan Society for the Promotion of Science (JSPS). A part of the experiments was performed at the Center for Low Temperature Science, Institute for Materials Research, Tohoku University. Publisher Copyright: © 2017 Author(s).

PY - 2017/3/20

Y1 - 2017/3/20

N2 - We report the martensitic transformation behavior in Co-V-Ga Heusler alloys. Thermoanalysis and thermomagnetization measurements were conducted to observe the martensitic transformation. By using a transmission electron microscope and an in situ X-ray diffractometer, martensitic transformation was found to occur from the L21 Heusler parent phase to the D022 martensite phase. Phase diagrams were determined for two pseudo-binary sections where martensitic transformation was detected. Magnetic properties, including the Curie temperatures and spontaneous magnetization of the parent phase, were also investigated. The magnetic properties showing behaviors different from those of NiMn-based alloys were found.

AB - We report the martensitic transformation behavior in Co-V-Ga Heusler alloys. Thermoanalysis and thermomagnetization measurements were conducted to observe the martensitic transformation. By using a transmission electron microscope and an in situ X-ray diffractometer, martensitic transformation was found to occur from the L21 Heusler parent phase to the D022 martensite phase. Phase diagrams were determined for two pseudo-binary sections where martensitic transformation was detected. Magnetic properties, including the Curie temperatures and spontaneous magnetization of the parent phase, were also investigated. The magnetic properties showing behaviors different from those of NiMn-based alloys were found.

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Martensitic transformation and phase diagram in ternary Co-V-Ga Heusler alloys

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