TY - JOUR
T1 - Novel magnetism of Ir 5 + (5 d 4) ions in the double Perovskite Sr 2 YIrO 6
AU - Cao, G.
AU - Qi, T. F.
AU - Li, L.
AU - Terzic, J.
AU - Yuan, S. J.
AU - Delong, L. E.
AU - Murthy, G.
AU - Kaul, R. K.
PY - 2014/2/6
Y1 - 2014/2/6
N2 - We synthesize and study single crystals of a new double-perovskite Sr2YIrO6. Despite two strongly unfavorable conditions for magnetic order, namely, pentavalent Ir5+(5d4) ions which are anticipated to have Jeff=0 singlet ground states in the strong spin-orbit coupling (SOC) limit and geometric frustration in a face-centered cubic structure formed by the Ir5+ ions, we observe this iridate to undergo a novel magnetic transition at temperatures below 1.3 K. We provide compelling experimental and theoretical evidence that the origin of magnetism is in an unusual interplay between strong noncubic crystal fields, local exchange interactions, and "intermediate- strength" SOC. Sr2YIrO6 provides a rare example of the failed dominance of SOC in the iridates.
AB - We synthesize and study single crystals of a new double-perovskite Sr2YIrO6. Despite two strongly unfavorable conditions for magnetic order, namely, pentavalent Ir5+(5d4) ions which are anticipated to have Jeff=0 singlet ground states in the strong spin-orbit coupling (SOC) limit and geometric frustration in a face-centered cubic structure formed by the Ir5+ ions, we observe this iridate to undergo a novel magnetic transition at temperatures below 1.3 K. We provide compelling experimental and theoretical evidence that the origin of magnetism is in an unusual interplay between strong noncubic crystal fields, local exchange interactions, and "intermediate- strength" SOC. Sr2YIrO6 provides a rare example of the failed dominance of SOC in the iridates.
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U2 - 10.1103/PhysRevLett.112.056402
DO - 10.1103/PhysRevLett.112.056402
M3 - Article
AN - SCOPUS:84894414372
SN - 0031-9007
VL - 112
JO - Physical Review Letters
JF - Physical Review Letters
IS - 5
M1 - 056402
ER -