Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2006-01-22
Physics
Condensed Matter
Strongly Correlated Electrons
5 figures
Scientific paper
10.1103/PhysRevB.73.224420
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.
Cao Gang
Chikara S.
Douglass Angela
Durairaj V.
Lin X. N.
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