ESR study of strain effect on phase separation in Pr0.7(Ca0.6Sr0.4)0.3MnO3 Thin Films

Author

Ma, Q. ; Zhao, Y. ; Hu, F. ; Sun, J. ; Shen, B. ; Sun, Y.

Author_Institution

Beijing Nat. Lab. for Condensed Matter Phys., Inst. of Phys., Beijing, China

fYear

2015

fDate

11-15 May 2015

Firstpage

1

Lastpage

1

Abstract

This study investigates the strain effect on phase separation in Pr_0.7(Ca_0.6Sr_0.4)_0.3MnO₃ (PCSMO) thin films using electron spin resonance. At high temperature well above the Curie temperature of the bulk PCSMO, only a single broad Lorentzian paramagnetic resonance (PMR) line is observed. At low temperatures, the complex ESR signal consisting of multiple resonance lines is a hallmark of intrinsic magnetic phase separation in PCSMO. With decreasing temperature, the central resonance field shifts to lower magnetic field, indicating the development of ferromagnetic correlations. The effect of in-plane tensile and compressive strains on the double exchange interaction of the material is discussed.

Keywords

Curie temperature; calcium compounds; exchange interactions (electron); ferromagnetic materials; internal stresses; magnetic thin films; paramagnetic resonance; phase separation; praseodymium compounds; strontium compounds; Curie temperature; ESR; Pr_0.7(Ca_0.6Sr_0.4)_0.3MnO₃; double exchange interaction; electron spin resonance; ferromagnetic correlations; in-plane compressive strain; in-plane tensile strain; intrinsic magnetic phase separation; magnetic field; multiple resonance lines; single broad Lorentzian paramagnetic resonance line; thin films; Correlation; Films; Frequency modulation; Lattices; Strain; Sun;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetics Conference (INTERMAG), 2015 IEEE

Conference_Location

Beijing

Print_ISBN

978-1-4799-7321-7

Type

conf

DOI

10.1109/INTMAG.2015.7156910

Filename

7156910