Magnetic Compton Scattering on Sr-Doped LaCoO₃

• Main Authors: Yoshihiko Kobayashi, Naruki Tsuji, Yoshiharu Sakurai
• Format: Article
• Language: English
• Published: MDPI AG 2021-05-01
• Series: Crystals
• Subjects: Sr-doped LaCoO₃; magnetic ground state; spin-state; orbital moment; magnetic Compton scattering
• Online Access: https://www.mdpi.com/2073-4352/11/6/577

We carried out magnetic Compton scattering experiments on the Sr-doped perovskite cobaltite La_1−<i>x</i>Sr<i>x</i>CoO₃ for the paramagnetic insulator (<i>x</i> = 0.1) and the ferromagnetic metallic (<i>x</i> = 0.3) phases in order to investigate the electron-orbital state relevant to its unusual magnetic and electronic transport properties. The ratio of the orbital moments to the spin moments (<i>M</i>_orbital/<i>M</i>_spin) is less than 1/10 at low temperatures for <i>x</i> = 0.3, whereas <i>M</i>_orbital/<i>M</i>_spin is about 0.4 almost independent of temperature for <i>x</i> = 0.1. The shape of <i>J_mag</i>(<i>p_z</i>) shows no apparent difference between the paramagnetic insulator and the ferromagnetic metallic phases.