Structural, magnetic, and electron transport properties of Mn3-xPtxSn (x = 0, 0.5, 1) nanomaterials
نویسندگان
چکیده
The structural, magnetic, and electron-transport properties of Mn 3Àx Pt x Sn (x ¼ 0, 0.5, 1) nanomaterials prepared by arc-melting, melt-spinning, and annealing were investigated. It was found that the hexagonal structure is the most stable structure for Mn 3 Sn and the samples show an antiferromagnetic spin order at room temperature. The Pt-containing samples are mainly tetragonal but contain a small amount of other impurity phases, including hexagonal Mn 3 Sn and Mn 2 Sn. At room temperature, the Pt-containing samples show ferri-or ferromagnetic spin order with a Curie temperature of about 370 K. The measured high-field magnetization and anisotropy constant for Mn 2 PtSn are 405 emu/cm 3 and 2.6 Mergs/cm 3 , respectively. The samples are all highly conducting with metallic electron transport and show a substantial negative magnetoresistance.
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تاریخ انتشار 2015