Itinerant-electron metamagnetic transition in LaFe12B6

作者：Fujieda S^*; Fukamichi K; Suzuki S

来源：Journal of Magnetism and Magnetic Materials, 2017, 421: 403-408.

DOI：10.1016/j.jmmm.2016.08.039

• Antiferromagnetic LaFe12B6
• Spin fluctuation
• Metamagnetic transition
• Kinetic arrest
• Magnetocaloric effect

LaFe12B6 (SrNi12B6-type) is an antiferromagnet with a low moment of 0.36 mu(B)/Fe-atom in the ground state. The field-induced first-order transition takes place in a wide range of temperature including below and above the Neel temperature of 35 K. This transition results in a high moment of 1.6 mu(B)/Fe-atom, being characteristics of the itinerant-electron metamagnetic transition. The critical magnetic field of the metamagnetic transition B-c increases with increasing temperature except for low temperature ranges, in which the kinetic arrest occurs. Above the arrested temperature, the sign of the temperature dependence of dB(c)/dT is positive. The metamagnetic transition brings about large magnetocaloric effects, that is, a large negative value of the isothermal magnetic entropy change, Delta S-m, and a large positive value of the adiabatic temperature change, Delta T-ad.

• 出版日期2017-1-1