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Structural and Microanalytical Studies of CrO2 Thin Films on c-Sapphire by High Resolution Electron Microscopy Methods

机译:高分辨率电子显微镜方法研究c-蓝宝石上CrO2薄膜的结构和微观分析

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摘要

Chromium dioxide (CrO2) has been extensively used in the magnetic recording industry. However, it is its ferromagnetic half-metallic nature that has more recently attracted much attention, primarily for the development of spintronic devices. CrO2 is the only stoichiometric binary oxide theoretically predicted to be fully spin polarized at the Fermi level. It presents a Curie temperature of ∼ 396 K, i.e. well above room temperature, and a magnetic moment of 2 mB per formula unit. However an antiferromagnetic native insulating layer of Cr2O3 is always present on the CrO2 surface which enhances the CrO2 magnetoresistance and might be used as a barrier in magnetic tunnel junctions.
机译:二氧化铬(CrO2)已广泛用于磁记录行业。然而,近来引起人们广泛关注的是其铁磁半金属性质,主要用于自旋电子器件的开发。 CrO2是理论上预计在费米能级完全自旋极化的唯一化学计量二元氧化物。它的居里温度约为396 K,即远高于室温,每个公式单位的磁矩为2 mB。但是,Cr2O3的反铁磁自然绝缘层始终存在于CrO2表面,这会增强CrO2的磁阻,并可能用作磁性隧道结中的势垒。

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