Nonresonant microwave absorption in epitaxial La-Sr-Mn-O films and its relation to colossal magnetoresistance

Abstract

We study magnetic-field-dependent nonresonant microwave absorption and dispersion in thin La${}_{0.7}$Sr${}_{0.3}$MnO${}_3$ films and show that it originates from the colossal magnetoresistance. We develop the model for magnetoresistance of a thin ferromagnetic film in oblique magnetic field. The model accounts fairly well for our experimental findings, as well as for results of other researchers. We demonstrate that nonresonant microwave absorption is a powerful technique that allows contactless measurement of magnetic properties of thin films, including magnetoresistance, anisotropy field and coercive field.

arXiv comment20 pages, 11 figures

References in corpus (6)

• Extrinsic Magnetotransport Phenomena in Ferromagnetic Oxides
• Grain boundary effects on magnetotransport in bi-epitaxial films of La${}_{0.7}$Sr${}_{0.3}$MnO${}_3$
• Superconducting and normal-state interlayer-exchange-coupling in La${}_{0.67}$Sr${}_{0.33}$MnO$3$-YBa${}_2$Cu${}_3$O${}_7-La$_{0.67}$Sr$_{0.33}$MnO${3}$ epitaxial trilayers
• Precision microwave dielectric and magnetic susceptibility measurements of correlated electronic materials using superconducting cavities
• Magnetic Domain Walls in Single-Phase and Phase-Separated Double Exchange Systems
• A new method for direct rf power absorption studies in CMR materials and high T_c superconductors

Cited by in corpus (4)

• Spin wave resonances in La_{0.7}Sr_{0.3}MnO_{3} films: measurement of spin wave stiffness and anisotropy field
• Unusual field dependence of radio frequency magnetoimpedance in La0.67Ba0.33MnO3
• Magnetically tunable rf wave absorption in polycrystalline La0.67Ba0.33MnO3
• Low-field microwave absorption in epitaxial La-Sr-Mn-O films resulting from the angle-tuned ferromagnetic resonance in the multidomain state