We have performed systematic in-plane angle-dependent c-axis transverse magnetotransport measurements on the double-layered ruthenate Ca 3Ru2O7 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 Ca 3Ru2O7 and posts a challenging question: why does the change of magnetic-field orientation result in magnetic phase transitions.
|Original language||English (US)|
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|State||Published - Jul 11 2011|
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics