Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA.
Ames Laboratory-USDOE and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA.
Sci Rep. 2017 Feb 17;7:42789. doi: 10.1038/srep42789.
Studies on the phenomenon of magnetoresistance (MR) have produced intriguing and application-oriented outcomes for decades-colossal MR, giant MR and recently discovered extremely large MR of millions of percents in semimetals can be taken as examples. We report here the discovery of novel multiple sign changes versus applied magnetic field of the MR in the cubic intermetallic compound GdPd. Our study shows that a very strong correlation between magnetic, electrical and magnetotransport properties is present in this compound. The magnetic structure in GdPd is highly fragile since applied magnetic fields of moderate strength significantly alter the spin arrangement within the system-a behavior that manifests itself in the oscillating MR. Intriguing magnetotransport characteristics of GdPd are appealing for field-sensitive device applications, especially if the MR oscillation could materialize at higher temperature by manipulating the magnetic interaction through perturbations caused by chemical substitutions.
几十年来，对磁阻（MR）现象的研究产生了有趣且面向应用的成果——巨磁阻、超巨磁阻，以及最近在半金属中发现的高达数百万百分比的超高磁阻都可以作为例子。我们在此报告了立方金属间化合物 GdPd 中磁阻（MR）的新型多符号变化与外加磁场的发现。我们的研究表明，该化合物中存在磁、电和磁输运性质之间的非常强的相关性。GdPd 的磁结构非常脆弱，因为中等强度的外加磁场会显著改变系统内的自旋排列——这种行为表现在磁阻的振荡中。GdPd 引人入胜的磁输运特性对场敏感器件的应用具有吸引力，特别是如果通过化学取代引起的扰动来操纵磁相互作用，使 MR 振荡在更高温度下实现的话。
