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Pd2 MnGa Metamagnetic Shape Memory Alloy with Small Energy Loss.
Ito, Tatsuya; Xu, Xiao; Miyake, Atsushi; Kinoshita, Yuto; Nagasako, Makoto; Takahashi, Kohki; Omori, Toshihiro; Tokunaga, Masashi; Kainuma, Ryosuke.
Afiliación
  • Ito T; Department of Materials Science, Graduate School of Engineering, Tohoku University, Aoba-yama 6-6-02, Sendai, 980-8579, Japan.
  • Xu X; Department of Materials Science, Graduate School of Engineering, Tohoku University, Aoba-yama 6-6-02, Sendai, 980-8579, Japan.
  • Miyake A; Organization for Advanced Studies, Tohoku University, Katahira 2-1-1, Sendai, 980-8577, Japan.
  • Kinoshita Y; The Institute for Solid State Physics, The University of Tokyo, Kashiwanoha 5-1-5, Kashiwa, 277-8581, Japan.
  • Nagasako M; The Institute for Solid State Physics, The University of Tokyo, Kashiwanoha 5-1-5, Kashiwa, 277-8581, Japan.
  • Takahashi K; Institute for Materials Research, Tohoku University, Katahira 2-1-1, Sendai, 980-8577, Japan.
  • Omori T; Institute for Materials Research, Tohoku University, Katahira 2-1-1, Sendai, 980-8577, Japan.
  • Tokunaga M; Department of Materials Science, Graduate School of Engineering, Tohoku University, Aoba-yama 6-6-02, Sendai, 980-8579, Japan.
  • Kainuma R; The Institute for Solid State Physics, The University of Tokyo, Kashiwanoha 5-1-5, Kashiwa, 277-8581, Japan.
Adv Sci (Weinh) ; 10(23): e2207779, 2023 Aug.
Article en En | MEDLINE | ID: mdl-37309306
Metamagnetic shape memory alloys (MMSMAs) are attractive functional materials owing to their unique properties such as magnetostrain, magnetoresistance, and the magnetocaloric effect caused by magnetic-field-induced transitions. However, the energy loss during the martensitic transformation, that is, the dissipation energy, Edis , is sometimes large for these alloys, which limits their applications. In this paper, a new Pd2 MnGa Heusler-type MMSMA with an extremely small Edis and hysteresis is reported. The microstructures, crystal structures, magnetic properties, martensitic transformations, and magnetic-field-induced strain of aged Pd2 MnGa alloys are investigated. A martensitic transformation from L21 to 10M structures is seen at 127.4 K with a small thermal hysteresis of 1.3 K. The reverse martensitic transformation is induced by applying a magnetic field with a small Edis (= 0.3 J mol-1 only) and a small magnetic-field hysteresis (= 7 kOe) at 120 K. The low values of Edis and the hysteresis may be attributed to good lattice compatibility in the martensitic transformation. A large magnetic-field-induced strain of 0.26% is recorded, indicating the proposed MMSMA's potential as an actuator. The Pd2 MnGa alloy with low values of Edis and hysteresis may enable new possibilities for high-efficiency MMSMAs.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Adv Sci (Weinh) Año: 2023 Tipo del documento: Article País de afiliación: Japón Pais de publicación: Alemania
Texto completo
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XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Adv Sci (Weinh) Año: 2023 Tipo del documento: Article País de afiliación: Japón Pais de publicación: Alemania