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

X F Xu, A Carrington, A I Coldea, A Enayati-Rad, Alessandro Narduzzo, S Horii, N E Hussey

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12 Citations (SciVal)


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.
Original languageEnglish
Article number224435
JournalPhysical Review B
Issue number22
Publication statusPublished - 29 Jun 2010


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