Origin and tuning of the magnetocaloric effect for the magnetic refrigerant MnFe(P1-xGex)

Autor:	Liu, Danmin, Zhang, Ming Yue Jiuxing, McQueen, T. M., Lynn, Jeffrey W., Wang, Xiaolu, Chen, Ying, Li, Jiying, Cava, R. J., Liu, Xubo, Altounian, Zaven, Huang, Qingzhen
Rok vydání:	2008
Předmět:	Condensed Matter - Materials Science Condensed Matter - Strongly Correlated Electrons
Zdroj:	Phys. Rev. B79, 014435 (2009)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.79.014435
Popis:	Neutron diffraction and magnetization measurements of the magneto refrigerant Mn1+yFe1-yP1-xGex reveal that the ferromagnetic and paramagnetic phases correspond to two very distinct crystal structures, with the magnetic entropy change as a function of magnetic field or temperature being directly controlled by the phase fraction of this first-order transition. By tuning the physical properties of this system we have achieved a maximum magnetic entropy change exceeding 74 J/Kg K for both increasing and decreasing field, more than twice the value of the previous record. Comment: 6 Figures. One table
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0807.3707 Zobrazit plný text záznamu View this record from Arxiv