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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Giant magneto-resistance in p-n junction composed of beta-FeSi_2-Si
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Giant magneto-resistance in p-n junction composed of beta-FeSi_2-Si

机译：β-FeSi_2-Si构成的p-n结中的巨磁阻

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摘要

Fe-Si alloy system was investigated on the magneto-resistance (MR) effects in a temperature range between 77K-RT and in high fields up to 30 T. The samples were prepared by sputtering Fe(200 run) on n-Si(l 0 0) surface and variously annealed up to p-FeSi_2 are obtained. The MR effects were found small less than several percent, negative at RT and positive at T= 77K for Fe-rich samples. For a sample at the stoichiometric beta-Fe-Si_2 on n-Si as a p-n junction, we found a positive MR as large as 30 percent at RT in B = 30 T. The physical mechanism of the large MR is tentatively given by the carrier freeze-out effect in between the p-n.
机译：研究了Fe-Si合金体系在77K-RT和最高30 T的高磁场中的磁阻（MR）效应。通过在n-Si（l （0 0）表面，并进行各种退火直至p-FeSi_2。对于富含铁的样品，发现MR效应小于百分之几，在RT时为负，在T = 77K时为正。对于在n-Si上作为pn结的化学计量的β-Fe-Si_2的样品，我们发现在B = 30 T的RT下，正MR高达30％。大MR的物理机理暂时由pn之间的载流子冻结效应。

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