Large Negative Thermal Expansion and Magnetoelastic Coupling in Metamagnetic Tetragonal (Mn, T)2Sb (T = Cr, V) Alloys
| Autor: | Ni Zhao, Yongjian Zhang, Yuzhuo Yan, Jiancheng Yang, Xiaoxiao Fu, Guiquan Yao, Weibin Cui |
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| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Phase transition Materials science Condensed matter physics Alloy Magnetostriction engineering.material Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials Tetragonal crystal system Differential scanning calorimetry Negative thermal expansion 0103 physical sciences engineering 010306 general physics Magnetoelastic coupling Metamagnetism |
| Zdroj: | Journal of Superconductivity and Novel Magnetism. 33:2551-2555 |
| ISSN: | 1557-1947 1557-1939 |
| DOI: | 10.1007/s10948-020-05520-3 |
| Popis: | Metamagnetic phase transition of Mn2-xCrxSb (x = 0.07, 0.09, and 0.11) and Mn2-yVySb (y = 0.1, 0.15) alloys had been studied. More Cr and V substitutions lead into increased phase transition temperature, which is confirmed by differential scanning calorimetry (DSC) measurement. The maximized saturation magnetostriction (λs//) of − 1350 ppm and − 610 ppm under 7 T have been realized in Mn1.93Cr0.07Sb alloy and Mn1.9V0.1Sb alloy, respectively, and gradually decreased with more substitution. Giant negative thermal expansion (NTE) is triggered by metamagnetism. The highest linear coefficient of − 42.4 ppm/K is obtained in Mn1.93Cr0.07Sb alloy, but almost zero expansion is obtained in Mn1.85V0.15Sb alloy. The coincident highest ΔSmax associated with the maximized λs// in both Mn2-xCrxSb (x = 0.07, 0.09, and 0.11) and Mn2-yVySb (y = 0.1, 0.15) systems suggests that the strong magnetoelastic coupling is also beneficial to enhance the magnetic entropy change. |
| Databáze: | OpenAIRE |
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