We present a comprehensive analysis of the Dzyaloshinsky-Moriya interaction and crystal-field parameters using the angular dependence of the paramagnetic-resonance shift and linewidth in single crystals of ${\mathrm{La}}_{0.95}{\mathrm{Sr}}_{0.05}{\mathrm{MnO}}_3$ within the orthorhombic Jahn-Teller distorted phase. The Dzyaloshinsky-Moriya interaction $\left(\sim 1\hspace{0.5em}\mathrm{K}\right)$ results from the tilting of the ${\mathrm{MnO}}_6$ octahedra against each other. The crystal-field parameters D and E are found to be of comparable magnitude $\left(\sim 1\hspace{0.5em}\mathrm{K}\right)$ with $D\approx -E.\mathrm{}$ This indicates a strong mixing of the $|{3z}^2-r^2〉$ and $|x^2-y^2〉$ states for the real orbital order.

• Received 28 August 2001

DOI:https://doi.org/10.1103/PhysRevB.65.104440