We investigated the influence of the deposition rate on structural and magnetic properties of inverse-spinel ferrimagnet NiCo 2 O 4 epitaxial films grown by pulsed laser deposition. While films’ lattice constants are insensitive to the deposition rate, saturation magnetization, and perpendicular magnetic anisotropy for the film grown with a high deposition rate are reduced. These results imply that growing NiCo 2 O 4 films with a high deposition rate leads to occupations of the tetrahedral site by Ni, although Ni ideally occupies only the octahedral site. Controlling the deposition rate and modulating the cation distribution is the key for tuning the magnetic properties in NiCo 2 O 4 films.

中文翻译：

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沉积速率对脉冲激光沉积制备的反向脊NiCo 2 O 4外延薄膜磁性能的影响

我们研究了沉积速率对通过脉冲激光沉积生长的反尖晶石型铁磁体NiCo 2 O 4外延膜的结构和磁性的影响。虽然薄膜的晶格常数对沉积速率不敏感，但降低了以高沉积速率生长的薄膜的饱和磁化强度和垂直磁各向异性。这些结果表明，尽管Ni理想地仅占据八面体位置，但是生长具有高沉积速率的NiCo 2 O 4膜会导致Ni占据四面体位置。控制沉积速率和调节阳离子分布是调节NiCo 2 O 4薄膜磁性能的关键。