Anomalous physical properties of Heusler-type Co2Cr(Ga,Si) alloys and thermodynamic study on reentrant martensitic transformation

Xiao Xu, Makoto Nagasako, Mitsuo Kataoka, Rie Y. Umetsu, Toshihiro Omori, Takeshi Kanomata, and Ryosuke Kainuma
Phys. Rev. B 91, 104434 – Published 31 March 2015; Erratum Phys. Rev. B 94, 099902 (2016)

Abstract

Electronic, magnetic, and thermodynamic properties of Co2Cr(Ga,Si)-based shape-memory alloys, which exhibit reentrant martensitic transformation (RMT) behavior, were studied experimentally. For electric resistivity (ER), an inverse (semiconductor-like) temperature dependence in the parent phase was found, along with anomalous behavior below its Curie temperature. A pseudobinary phase diagram was determined, which gives a “martensite loop” clearly showing the reentrant behavior. Differential scanning calorimetry and specific-heat measurements were used to derive the entropy change ΔS between martensite and parent phases. The temperature dependence of the derived ΔS was analyzed thermodynamically to confirm the appearances of both the RMT and normal martensitic transformation. Detailed studies on the specific heat in martensite and parent phases at low temperatures were also conducted.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
1 More
  • Received 26 December 2014
  • Revised 1 March 2015

DOI:https://doi.org/10.1103/PhysRevB.91.104434

©2015 American Physical Society

Erratum

Erratum: Anomalous physical properties of Heusler-type Co2Cr(Ga,Si) alloys and thermodynamic study on reentrant martensitic transformation [Phys. Rev. B 91, 104434 (2015)]

Xiao Xu, Makoto Nagasako, Mitsuo Kataoka, Rie Y. Umetsu, Toshihiro Omori, Takeshi Kanomata, and Ryosuke Kainuma
Phys. Rev. B 94, 099902 (2016)

Authors & Affiliations

Xiao Xu1,*, Makoto Nagasako2, Mitsuo Kataoka3, Rie Y. Umetsu2, Toshihiro Omori1, Takeshi Kanomata1,4, and Ryosuke Kainuma1

  • 1Department of Materials Science, Tohoku University, Sendai 980-8579, Japan
  • 2Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
  • 3Laboratory for Solid State Physics, Moniwadai 2-1-1, Taihaku-ku, Sendai 982-0252, Japan
  • 4Research Institute for Engineering and Technology, Tohoku Gakuin University, Tagajo 985-8537, Japan

  • *Corresponding author: xu@material.tohoku.ac.jp

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 91, Iss. 10 — 1 March 2015

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×