Giant magnetoresistance in Cu-Mn-Al.
Giant magnetoresistance in Cu-Mn-Al.
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DOI：
10.1103/physrevb.54.3033
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发表时间：
1996-08
期刊：
影响因子：
--
通讯作者：
Yiping;Murthy;Hadjipanayis;Wan
中科院分区：
文献类型：
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作者：
Yiping;Murthy;Hadjipanayis;Wan
在熔纺 Cu x Mn y Al z 带材（x= 50–65、y= 5–25 和 z= 25–30）中观察到巨负磁阻 (GMR)，在 30 K 时值高达 15%。在所有具有非化学计量成分的样品中都观察到了 GMR，这些样品具有由富锰和贫锰 Cu 2 的混合物组成的花呢结构。 MnAl型(2:1:1)区域和/或磁性2:1:1和非磁性Cu 9 Al 4 (9:4)相的精细混合物。以 2:1:1 相作为主要相的样品获得了最高值。观察到的 GMR 归因于这些精细结构混合物的界面散射。© 1996 美国物理学会。
Giant negative magnetoresistance (GMR) has been observed in melt-spun Cu x Mn y Al z ribbons (x= 50–65, y= 5–25, and z= 25–30), with values up to 15% at 30 K. GMR was observed in all samples with off-stoichiometric composition which had a tweed structure consisting of a mixture of Mn-rich and Mn-poor Cu 2 MnAl-type (2: 1: 1) regions and/or of a fine mixture of magnetic 2: 1: 1 and nonmagnetic Cu 9 Al 4 (9: 4) phases. The highest value was obtained in samples with the 2: 1: 1 phase as a majority phase. The observed GMR is attributed to interfacial scattering at these fine structural mixtures.© 1996 The American Physical Society.