Antiferromagnetic vs ferromagnetic interactions and spin-glass-like behavior in ruthenates

Abstract

We have made a series of gradient-corrected relativistic full-potential density-functional calculation for Ca-substituted and hole-doped SrRuO${}_3$ in para, ferro, and $A$-, $C$-, and $G$-type antiferromagnetic states. Magnetic phase-diagram data for Sr${}_{1-x}$Ca${}_x$RuO${}_3$ at 0 K are presented. Neutron diffraction measurement combined with total energy calculations show that spin-glass behavior with short-range antiferromagnetic interactions rules in CaRuO${}_3$. The substitution of Sr by Ca in SrRuO${}_3$ decreases the ferromagnetic interaction and enhances the $G$-type antiferromagnetic interaction; the $G$-AF state is found to stabilize around $x$ = 0.75 consistent with experimental observations. Inclusion of spin-orbit coupling is found to be important in order to arrive at the correct magnetic ground state in ruthenates.

5 pages, 3 figures. Solid state communications (in press)

References in corpus (1)

• Optical investigation on the electronic structures of Y_{2}Ru_{2}O_{7}, CaRuO_{3}, SrRuO_{3}, and Bi_{2}Ru_{2}O_{7}

Cited by in corpus (2)

• The electronic structures and magnetic properties of perovskite ruthenates from constrained orbital hybridization calculations
• Probing a spin-glass state in SrRuO3 thin films through higher-order statistics of resistance fluctuations