MAGNETORESISTIVE PROPERTIES OF NONUNIFORM STATE OF ANTIFERROMAGNETIC SEMICONDUCTORS

The phenomenological model of magnetoresistive properties of magneto-n on-single-phase state of alloyed magnetic semiconductors is considered using the concept derived for a description of magnetoresistive effec ts in layered and granular magnetic metals. By assuming that there exi sts a magneto-non-single state in the manganites having the perovskite structure, it is possible to describe, in the framework of above appr oach, large magnetoresistive effects of manganite phases with antiferr omagnetic order and semiconductor-type conductivity as well as those w ith antiferromagnetic properties and metallic-type conductivity.