Magnetic properties and magnetoresistance of polycrystalline SrLaCoO4

作者：Liu YY; Chen XM^*; Liu XQ

来源：Solid State Communications, 2005, 136(11-12): 576-579.

DOI：10.1016/j.ssc.2005.09.035

• K2NiF4
• SrLaCoO4
• ferromagnetic
• magnetoresistance
• paramagnetic

Polycrystalline SrLaCoO4 with tetragonal K2NiF4 structure were prepared by a solid-state reaction process, and their magnetic properties and magnetoresistance effect were investigated systematically. The paramagnetic-ferromagnetic transition occurred at similar to 250 K. The curves of magnetization versus magnetic field at 150, 200 and 273 K showed soft ferromagnetic, super paramagnetic and paramagnetic behavior, respectively. The resistivity increased monotonically with decreasing temperature. The magnetoresistance peak at similar to 250 K was due to the ferromagnetic transition. As for the magnetoresistance peak at 12 K, the spin-glass transition at similar to 12K should be responsible for it. In a magnetic field of 5T, the maximum magnetoresitance (MR) of - 18.4% was obtained at 12 K.

• 出版日期2005-12
• 单位浙江大学