Tuning Martensitic Phase Transition by Non-Magnetic Atom Vacancy in MnCoGe Alloys and Related Giant Magnetocaloric Effect.
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| Title: | Tuning Martensitic Phase Transition by Non-Magnetic Atom Vacancy in MnCoGe Alloys and Related Giant Magnetocaloric Effect. |
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| Authors: | Li-Fu Bao1 leaf_bao@yeah.net, Wen-Deng Huang1,2, Ya-Jie Ren1 |
| Source: | Chinese Physics Letters. Jul2016, Vol. 33 Issue 7, p1-1. 1p. |
| Subjects: | Phase transitions, Magnetocaloric effects, Alloys, Magnetic entropy, X-ray diffraction |
| Abstract: | The effects of non-magnetic atom vacancy on structural, martensitic phase transitions and the corresponding magnetocaloric effect in MnCoGe1−x alloys are investigated using x-ray diffraction and magnetic measurements. The introduction of non-magnetic atom vacancy leads to the decrease of the martensitic transition temperature and realizes a temperature window where magnetic and martensitic phase transitions can be tuned together. Moreover, the giant magnetocaloric effect accompanied with the coupled magnetic-structural transition is obtained. It is observed that the peak values of magnetic entropy change of MnCoGe0.97 are about −13.9, −35.1 and −47.4 J·kg−1 K−1 for ΔH = 2, 5, 7 T, respectively. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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