Mechanism of the Tensile-Strain Effect in La0.67Ca0.33MnO3 and La0.8Ba0.2MnO3 Thin Films

Author

Yuan, F. ; Hsu, S. ; Wu, C. ; Lin, Chong ; Chou, H. ; Lin, Chong

Author_Institution

Nat. Sun Yat-Sen Univ., Kaohsiung

fYear

2006

fDate

8-12 May 2006

Firstpage

372

Lastpage

372

Abstract

In this study, we employ X-ray absorption near edge structure (XANES) of the La_0.67Ca_0.33MnO₃ and La_0.8Ba_0.2MnO₃ films with various thicknesses to understand the mechanism of the tensile-strain effect. The ferromagnetic-paramagnetic and the metal-insulator transition temperatures of the colossal magnetoresistance (CMR) thin film can be changed by the tensile-strain effect due to a lattice mismatch between the thin film and substrate. The XANES measurements reveal the details of the coupling between cations and anions. The opposite tendency of peaks intensity for thin and thick LCMO and LBMO films suggests that the mechanism of the tensile strain rely on both O-La and O-Mn couplings.

Keywords

XANES; barium compounds; calcium compounds; colossal magnetoresistance; ferromagnetic-paramagnetic transitions; lanthanum compounds; magnetic thin films; metal-insulator transition; tensile strength; La_0.67Ca_0.33MnO₃; La_0.8Ba_0.2MnO₃; X-ray absorption near edge structure; XANES; colossal magnetoresistance; ferromagnetic-paramagnetic transition; lattice mismatch; metal-insulator transition; tensile-strain effect; thin films; Annealing; Colossal magnetoresistance; Electromagnetic wave absorption; Electrons; Metal-insulator structures; Physics; Sputtering; Substrates; Temperature; Transistors;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetics Conference, 2006. INTERMAG 2006. IEEE International

Conference_Location

San Diego, CA

Print_ISBN

1-4244-1479-2

Type

conf

DOI

10.1109/INTMAG.2006.376096

Filename

4261805