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首页> 美国政府科技报告 >New Sulfide Compounds MeXMn1-XS (Me=3d Metal) with the Colossal Magnetoresistance Effect
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New Sulfide Compounds MeXMn1-XS (Me=3d Metal) with the Colossal Magnetoresistance Effect

机译：新的硫化物化合物meXmn1-Xs（me = 3d金属）具有巨大的磁电阻效应

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This report results from a contract tasking L.V. Kirensky Institute of Physics as follows: The project objective is to synthesize the new MeXMn1-XS (Me=3d-metal) sulfide compounds and to study the electrical, magnetic and magnetoresistive properties. Recently oxide compounds of manganese (LaMnO3- type) with perovskite structure have been intensively investigated. This interest is caused by the observation of colossal magnetoresistance (CMR) effect in these materials under the certain technological conditions and doping levels. The practical significance of this effect and the importance of CMR mechanism study stimulate the search of new compounds with CMR and the experimental study of transport properties of the materials with different structure. It is known that alpha - MnS manganese monosulfide, similar to LaMnO3, has the specific antiferromagnetic order with the characteristic ferromagnetic orientation of spins in alternating planes (111). As in LaMnO3- based systems, the transition from antiferromagnetic semiconductor state (AFM) to ferromagnetic metallic state (FM) is observed in cation-substituted MeXMn1- XS (Me=Fe, Cr) manganese sulfides with the change of doping concentration. This allows the realization of the CMR effect in compounds created on basis of alpha - MnS.

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