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New phase diagram of Zn-doped CuGeO3

Y. Sasago·N. Koide·K. Uchinokura·Michael C. Martin·M. Hase·K. Hirota·G. Shirane
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Abstract

A series of high-quality single crystals of Cu$_{1-x}$Zn$_x$GeO$_3$ have been examined by neutron scattering techniques. An antiferromagnetic (AF) ordering is confirmed for samples with $x\geq 0.02$, in complete agreement with previous reports. We show that the spin-Peierls (SP) phase transition persists to 6\% Zn, whereas previous magnetic susceptibility measurements reported a deterioration of the SP transition above 2\% Zn. We present some details of the successive transitions upon lowering temperature into the spin-Peierls phase which is followed by a transition into an antiferromagnetically ordered phase. Below the Néel temperature we observe the coexistence of the SP lattice dimerization and AF states.

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Y. Sasago, N. Koide, K. Uchinokura, Michael C. Martin, M. Hase, K. Hirota, G. Shirane. 1996-03-28. New phase diagram of Zn-doped CuGeO3. https://doi.org/10.1103/physrevb.54.r6835

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