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23 April 2024

» arxiv » 1508.2207

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Complex field-induced states in Linarite PbCuSO$_4$(OH)$_2$ with a variety of high-order exotic SDW$_p$ states
B. Willenberg ; M. Schäpers ; A.U.B. Wolter ; S.-L. Drechsler ; M. Reehuis ; B. Büchner ; A.J. Studer ; K.C. Rule ; B. Ouladdiaf ; S. Süllow ; S. Nishimoto ;
Date:	10 Aug 2015
Abstract:	Low-temperature neutron diffraction and NMR studies of field-induced phases in linarite are presented for magnetic fields $H parallel b$ axis. A two-step spin-flop transition is observed as well as a transition transforming a helical magnetic ground state into an unusual magnetic phase with sine-wave modulated moments $parallel H$. An effective $ ilde{J}_1$-$ ilde{J}_2$ single-chain model with a magnetization-dependent frustration ratio $alpha_{ m eff} = - ilde{J}_2/ ilde{J}_1$ is proposed. The latter is governed by skew interchain couplings and shifted to the vicinity of the ferromagnetic critical point. It explains qualitatively the observation of a rich variety of exotic (for strongly correlated cuprate spin-1/2 Heisenberg systems) longitudinal collinear spin-density wave SDW$_p$ states ($9 geq p geq 2$).
Source:	arXiv, 1508.2207
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