Electron spin resonance and magnetization in La0.67Ca0.33MnO3 thin films

✍ Scribed by O. Arnache; P. Monod; N. Bontemps; D. Giratá; P. Prieto

• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 211 KB
• Volume: 384
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/j.physb.2006.05.153

✦ Synopsis

We report electron spin resonance (ESR) and magnetization measurements in La 0.67 Ca 0.33 MnO 3 thin films deposited on LaAlO 3 single-crystal substrates by DC sputtering technique. Angular and temperature dependence of resonance field (H Res ) and ESR line-width (DH PP ) were measured in the ferromagnetic and paramagnetic regime. Above T C , H Res is not shifted, while below T C , H Res for H ? and H J diverge, due to the presence of magnetic anisotropy and demagnetizing fields. Besides, when T is approaching T C from above, the DH PP goes to a minimum (E200 G) and DH PP increases below T C . Temperature dependence of magnetization in the films was obtained by using the relationship of H Res . These values were compared with SQUID measurements. Finally, we estimated the gyromagnetic factor in 1.996(6).