Borderline magnetism in Sr4Ru3O10: Impact of dilute La and Ca doping on itinerant ferromagnetism and metamagnetism

Abstract

An investigation of La and Ca doped Sr4Ru3O10, featuring a coexistence of interlayer ferromagnetism and intralayer metamagnetism, is presented. La doping readily changes magnetism between ferromagnetism and metamagnetism by tuning the density of states. It also results in different Curie temperatures for the c-axis and the basal plane, highlighting a rare spin-orbit coupling with the crystal field states. In contrast, Ca doping enhances the c-axis ferromagnetism and the magnetic anisotropy. La doping also induces a dimensional crossover in the interlayer transport whereas Ca doping exhibits a tunneling magnetoresistance and an extraordinary T3/2-dependence of the resisitivity. The drastic changes caused by the dilute doping demonstrate a rare borderline magnetism that is delicately linked to the interplay of the density of states and spin-orbit coupling.

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Cited by in corpus (7)

• Non-Fermi-liquid behavior in nearly ferromagnetic metallic SrIrO3 single crystals
• Unusual heavy-mass nearly ferromagnetic state with a surprisingly large Wilson ratio in the double layered ruthenates (Sr${}_{1-x}$Ca${}_x$)${}_3$Ru${}_2$O${}_7$
• Half-metallic ferromagnetism in Sr${}_3$Ru${}_2$O${}_7$
• Anomalous itinerant magnetism in single crystal Sr4Ru3O10: A thermodynamic and transport investigation
• Complex electronic states in double layered ruthenates (Sr1-xCax)3Ru2O7
• Ca3(Ru1-xCrx)2O7: A new paradigm for spin valves
• Observation of a pressure-induced transition from interlayer ferromagnetism to intralayer antiferromagnetism in Sr4Ru3O10