Journal
APPLIED PHYSICS LETTERS
Volume 100, Issue 17, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4704780
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Funding
- National Natural Science Foundation of China [50820135101]
- Ministry of Education of China [2007B35, 707017, IRT0713]
- Fundamental Research Funds for the Central Universities of China [N090602002, N100702001]
- French-Chinese International ANR [ANR-09-BLAN-0382]
- Sino-French Cai Yuanpei Program [24013QG]
- Laboratorio Nacional de Investigaciones en Nanociencias y Nanotecnologia (LINAN, IPICyT)
- CONACYT, Mexico [CB-2010-01-156932, CB-2010-01-157541]
- CSIC, Spain [JAEPRE-08-00508]
- Agence Nationale de la Recherche (ANR) [ANR-09-BLAN-0382] Funding Source: Agence Nationale de la Recherche (ANR)
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Microstructural features and magnetocaloric properties of Ni52Mn26Ga22 melt-spun ribbons were studied. Results show that there are four types of differently oriented variants of seven-layered modulated (7M) martensite at room temperature, being twin-related one another and clustered in colonies. Due to the coupled magnetic and structural transformations between parent austenite and 7M martensite, the melt-spun ribbons exhibit a significant magnetocaloric effect. At an applied magnetic field of 5 T, an absolute maximum value of the isothermal magnetic entropy change of 11.4 J kg(-1) K-1 is achieved with negligible hysteresis losses. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4704780]
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