Title :
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
Abstract :
This study investigates the strain effect on phase separation in Pr0.7(Ca0.6Sr0.4)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; Pr0.7(Ca0.6Sr0.4)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;
Conference_Titel :
Magnetics Conference (INTERMAG), 2015 IEEE
Conference_Location :
Beijing
Print_ISBN :
978-1-4799-7321-7
DOI :
10.1109/INTMAG.2015.7156910
