Interplay of superexchange and orbital degeneracy in Cr-doped LaMnO3

Abstract

We report on structural, magnetic and Electron Spin Resonance (ESR) investigations in the manganite system LaMn_{1-x}Cr_{x}O_{3} (x<=0.5). Upon Cr-doping we observe a reduction of the Jahn-Teller distortion yielding less distorted orthorhombic structures. A transition from the Jahn-Teller distorted O' to the pseudocubic O phase occurs between 0.3<x<0.4. A clear connection between this transition and the doping dependence of the magnetic and ESR properties has been observed. The effective moments determined by ESR seem reduced with respect to the spin-only value of both Mn^{3+} and Cr^{3+} ions.

References in corpus (3)

• Crystal Field and Dzyaloshinsky-Moriya Interaction in orbitally ordered La_{0.95}Sr_{0.05}MnO_3: An ESR Study
• Orbital effects in manganites
• A Resonant X-ray Scattering Study of Octahedral Tilt Ordering in LaMnO${}_3$ and Pr${}_{1-x}$Ca${}_x$MnO${}_3$

Cited by in corpus (6)

• The Orbital Order Parameter in La0.95Sr0.05MnO3 probed by Electron Spin Resonance
• Korringa-like relaxation in the high-temperature phase of A-site ordered YBaMn2O6
• Emergence of ferromagnetism and Jahn-Teller distortion in low Cr-substituted LaMnO3
• Investigation of element-specific and bulk magnetism, electronic and crystal structures of La{0.70}Ca{0.30}Mn{1-x}Cr{x}O{3}
• Electron Spin Resonance across the Charge-ordering Transition in YBaMn2O6
• Transverse spin relaxation and magnetic correlation in $P{r}_{1-x}C{a}_{x}Mn{O}_3$ : influence of particle size variation and chemical doping