Journal
PHYSICAL REVIEW B
Volume 84, Issue 1, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.84.014406
Keywords
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Funding
- DOD ARO [W911NF0910530]
- NSF [DMR-0645305]
- DOE [DE-FG02-07ER46358]
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We have performed systematic in-plane angle-dependent c-axis transverse magnetotransport measurements on the double-layered ruthenate Ca3Ru2O7 throughout a broad field and temperature range. Our results reveal that the magnetic states unusually evolve with in-plane rotation of magnetic field. When magnetic field is applied along the b axis, we probe crossover magnetic states in close proximity to phase boundaries of long-range ordered antiferromagnetic states. These crossover magnetic states are characterized by short-range antiferromagnetic order and switch to polarized paramagnetic states at critical angles as the in-plane field is rotated from the b to the a axis. Additionally, we observe bulk spin-valve behavior resulting from spin-flop transitions tuned by in-plane rotation of magnetic field. Our results highlight the complex nature of the spin-charge coupling in Ca3Ru2O7 and posts a challenging question: why does the change of magnetic-field orientation result in magnetic phase transitions.
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