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arXiv 1002.4726cond-mat.str-elcond-mat.mtrl-sci
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LaCoO3薄膜的晶格结构与磁化强度

Lattice structure and magnetization of LaCoO3 thin films

A. D. Rata, A. Herklotz, L. Schultz, K. Doerr

摘要:

研究了LaCoO $_{3}$化合物薄膜的结构和磁性。通过脉冲激光沉积在各种衬底上沉积薄膜,以便将应变从压缩调整到拉伸。单相(001)取向的LaCoO $_{3}$层生长在所有的基板上,尽管大的失配。薄膜的四阶畸变率在-2%~2.8%之间。我们的LaCoO $_{3}$薄膜是铁磁性的居里温度约为85 K,相反的散装。总磁矩低于$1μ_{B}$ /Co $^{3+}$,该值对于Co $^{3+}$离子的激发自旋态相对较小,但与文献中报道的值相当。观察到LaCoOPDMATHABMM薄膜中CoPDMATHABMO离子的应变状态与磁矩的相关性。

英文摘要:

We investigate the structure and magnetic properties of thin films of the LaCoO$_{3}$ compound. Thin films are deposited by pulsed laser deposition on various substrates in order to tune the strain from compressive to tensile. Single-phase (001) oriented LaCoO$_{3}$ layers were grown on all substrates despite large misfits. The tetragonal distortion of the films covers a wide range from -2% to 2.8%. Our LaCoO$_{3}$ films are ferromagnetic with Curie temperature around 85 K, contrary to the bulk. The total magnetic moment is below $1μ_{B}$/Co$^{3+}$, a value relatively small for an exited spin-state of the Co$^{3+}$ ions, but comparable to values reported in literature. A correlation of strain states and magnetic moment of Co$^{3+}$ ions in LaCoO$_{3}$ thin films is observed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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