Dimensionality-driven spin-flop transition in quasi-one-dimensional PrBa2Cu4O8

作者：Xu Xiaofeng^*; Carrington A; Coldea A I; Enayati Rad A; Narduzzo A; Horii S; Hussey N E

来源：Physical Review B, 2010, 81(22): 224435.

DOI：10.1103/PhysRevB.81.224435

In the quasi-one-dimensional cuprate PrBa2Cu4O8, the Pr cations order antiferromagnetically at 17 K in zero field. Through a combination of magnetic susceptibility, torque magnetometry, specific heat, and interchain transport measurements, the anisotropic temperature-magnetic-field phase diagram associated with this ordering has been mapped out. A low-temperature spin-flop transition in the Pr sublattice is found to occur at the same magnetic field strength and orientation as a dimensional crossover in the ground state of the metallic-CuO chains. This coincidence suggests that the spin reorientation is driven by a change in the anisotropic Rudermann-Kittel-Kasuya-Yosida interaction induced by a corresponding change in effective dimensionality of the conduction electrons.

• 出版日期2010-6-29
• 单位杭州师范大学