The angular-dependent magnetoresistance (MR) in epitaxial Fe(001) films grown on MgO(001) is systematically investigated at room temperature. The resistivities with in-plane magnetic fields parallel ( ρ x ) and transverse ( ρ y ) to a current and a perpendicular field ( ρ z ) show a correlation of ρ z ≈ ρ x > ρ y for Fe film thickness ( d Fe ) between 3 and 50 nm, which is distinctly different from the conventional anisotropic MR relation of ρ x > ρ y ≈ ρ z . The dependence of such unusual MR on d Fe is quantitatively explained by the competition between the anomalous Hall MR, intrinsic anisotropic MR, and the MR induced by the geometrical size effect in Fe films. Our results also reveal the strong four-fold...

中文翻译：

---

Fe（001）单晶膜中的霍尔磁电阻异常

在室温下系统地研究了在MgO（001）上生长的外延Fe（001）薄膜中的角度依赖性磁阻（MR）。平面内磁场平行于电流（ρx）和横向（ρy）且垂直磁场（ρz）的电阻率显示出Fe膜厚度（d Fe）的ρz≈ρx>ρy的相关性。在3至50 nm之间，这与ρx>ρy≈ρz的常规各向异性MR关系明显不同。这种异常MR对d Fe的依赖性可以通过异常霍尔MR，固有各向异性MR和由Fe薄膜的几何尺寸效应引起的MR之间的竞争来定量解释。我们的结果还显示出强大的四倍...