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

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arxiv 1009.2885 v1 pith:ZEIQQJZ5 submitted 2010-09-15 cond-mat.str-el

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

Xiaofeng Xu , A. Carrington , A. I. Coldea , A. Enayati-Rad , A. Narduzzo , S. Horii , N. E. Hussey This is my paper
classification cond-mat.str-el
keywords fieldanisotropicchangemagneticquasi-one-dimensionalspin-floptransitionantiferromagnetically
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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In the quasi-one-dimensional cuprate PrBa$_2$Cu$_4$O$_8$, 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 sub-lattice 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 (RKKY) interaction induced by a corresponding change in effective dimensionality of the conduction electrons.

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