The article on magnetoresistance in disordered granular magnetic materials was published recently by Y.M. Beltukov, V.I. Kozub, and A.V. Shumilin in collaboration with N.P. Stepina from Rzhanov Institute of Semiconductor Physics, Novosibirsk.
We show that in the presence of disorder, magnetic anisotropy, and exchange interaction the well-known giant magnetoresistance acquires quite unusual properties. It does not saturate when the magnetization reaches quasi-saturation and can change its sign.
The article is published in Journal of Physics: Condensed Matter.
https://iopscience.iop.org/article/10.1088/1361-648X/abd053