Copie O, Rode K, Mattana R, Bibes M, Cros V, Herranz G, Anane A, Ranchal R, Jacquet E, Bouzehouane K, Arrio M-A, Bencok P, Brookes N B, Petroff F, Barthélémy A
Unité Mixte de Physique CNRS/Thales, Campus de l'Ecole Polytechnique, 1 Avenue A Fresnel, 91767 Palaiseau, France and Université Paris-Sud 11, 91405 Orsay, France.
J Phys Condens Matter. 2009 Oct 7;21(40):406001. doi: 10.1088/0953-8984/21/40/406001. Epub 2009 Sep 8.
We report a study of Co-doped La(0.37)Sr(0.63)TiO(3-δ) thin films grown by pulsed laser deposition in various oxygen pressure conditions. X-ray absorption spectroscopy and magnetic circular dichroism measurements at the Co L(2,3) edges reveal that the cobalt mainly substitutes for the titanium and is in an ionic state. Nevertheless, in some films, indications of additional cobalt metallic impurities were found, suggesting that the intrinsic character of this magnetic system remains questionable.
我们报告了一项关于通过脉冲激光沉积在各种氧压条件下生长的共掺杂La(0.37)Sr(0.63)TiO(3 - δ)薄膜的研究。在Co L(2,3)边缘进行的X射线吸收光谱和磁圆二色性测量表明，钴主要替代钛且处于离子态。然而，在一些薄膜中发现了额外钴金属杂质的迹象，这表明该磁性系统的本征特性仍存在疑问。
