Title :
Variable-temperature MFM/EFM study of (La1-xPrx)0.67Ca0.33MnO3 thin films
Author :
Chung, S.H. ; Shinde, S.R. ; Ogale, S.B. ; Biswas, A. ; Venkatesan, T. ; Greene, R.L. ; Dreyer, M. ; Dottellis, J.B. ; Millis, A. ; Gomez, R.D.
Author_Institution :
Dept. of Phys., Maryland Univ., College Park, MD, USA
fDate :
9/1/2002 12:00:00 AM
Abstract :
Both ferromagnetic (FM) and charge-ordered domain structures of (La1-xPrx)0.67Ca0.33MnO3 thin film were detected by magnetic force microscopy (MFM) and electric force microscopy (EFM) operated at low temperatures near the peak resistance temperature (Tp). The in-plane-like FM domains of submicrometer size emerge below Tp, and their magnetic interaction with an MFM tip becomes stronger as the temperature is reduced. Charge-ordered insulating regions have the strong electrostatic interaction with an EFM tip near Tp, and the interaction correlates well with the temperature dependence of resistivity of the film.
Keywords :
atomic force microscopy; calcium compounds; charge-ordered states; colossal magnetoresistance; ferromagnetic materials; lanthanum compounds; magnetic domains; magnetic force microscopy; magnetic thin films; praseodymium compounds; (LaPr)0.67Ca0.33MnO3; AFM; charge-ordered domain structures; colossal magnetoresistance; electric force microscopy; ferromagnetic domain structures; force gradients; insulator-metal transition; low temperatures; magnetic force microscopy; peak resistance temperature; perovskite manganite thin films; strong electrostatic interaction; temperature dependence; Atomic force microscopy; Colossal magnetoresistance; Conductivity; Magnetic films; Magnetic force microscopy; Magnetic forces; Pulsed laser deposition; Superconducting films; Temperature; Transistors;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2002.803165
