Magnetocrystalline anisotropy and spin-wave stiffness in tensile-strained La0.67Ba0.33MnO3 films: An investigation via ferromagnetic resonanceReportar como inadecuado




Magnetocrystalline anisotropy and spin-wave stiffness in tensile-strained La0.67Ba0.33MnO3 films: An investigation via ferromagnetic resonance - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Chinese Science Bulletin

, Volume 58, Issue 33, pp 4057–4063

First Online: 26 July 2013Received: 10 April 2013Accepted: 05 June 2013DOI: 10.1007-s11434-013-6012-y

Cite this article as: Duanmu, Q., Tong, W., Yang, L. et al. Chin. Sci. Bull. 2013 58: 4057. doi:10.1007-s11434-013-6012-y

Abstract

Tensile-strained epitaxial La0.67Ba0.33MnO3 LBMO film has been prepared by magnetron sputtering technique on 001 oriented spinel MgAl2O4 substrate. The transport and magnetic measurements give an insulator-metal transition and paramagnetic-ferromagnetic transition occurring at ∼150 K and 250 K respectively, which implies the phase separation in such a tensile-strained film. By analyzing the angular and temperature dependences of the ferromagnetic resonance FMR, we determine the magnetocrystalline anisotropy of the film. It is found that the tensile-strained film is dominated by an easy-axis corresponding to the compressive out-of-plane direction, though the magnitudes of anisotropy constants are relatively small and their temperature dependences are some complex. Furthermore, the FMR spectra show additional spin wave resonance SWR, and the field positions can be indexed to follow a linear dependence on the square of index n. The scaling gives a spin-wave exchange stiffness D of 20.7 meV Å at low temperature, which is less than half of that in strain-free LBMO films, implying that the double exchange interaction is remarkably suppressed in the tensile-strained LBMO films.

Keywordstensile strain magnetotransport FMR magnetocrystalline anisotropy spin wave resonance This article is published with open access at Springerlink.com

Download to read the full article text



Autor: QingYong Duanmu - Wei Tong - Lei Yang - Lin Hao - ZhongFeng Zhang - XiaoPing Wang - Hong Zhu

Fuente: https://link.springer.com/







Documentos relacionados