Finite-size effects in the quasi-one-dimensional quantum magnets Sr$_{2}$CuO$_{3}$, Sr$_{2}$Cu$_{0.99}$M$_{0.01}$O$_{3}$ (M = Ni, Zn), and SrCuO$_{2}$

Koushik Karmakar; Surjeet Singh

doi:10.1103/PhysRevB.91.224401

paper

Finite-size effects in the quasi-one-dimensional quantum magnets Sr $_{2}$ CuO $_{3}$ , Sr $_{2}$ Cu $_{0.99}$ M $_{0.01}$ O $_{3}$ (M = Ni, Zn), and SrCuO $_{2}$

arXiv:1501.02334 · doi:10.1103/PhysRevB.91.224401

Abstract

We studied the finite-size effects on the magnetic behavior of the quasi-one-dimensional spin S = $\frac{1}{2}$ Heisenberg antiferromagnets Sr $_{2}$ CuO $_{3}$ , Sr $_{2}$ Cu $_{0.99}$ M $_{0.01}$ O $_{3}$ (M = Zn and Ni), and SrCuO $_{2}$ . Magnetic susceptibility data were analyzed to estimate the concentration of chain-breaks due to extrinsically doped defects and/or due to slight oxygen off-stoichiometry. We show that the susceptibility of Sr $_{2}$ Cu $_{0.99}$ Ni $_{0.01}$ O $_{3}$ can be described by considering Ni $^{2 +}$ as a scalar defect ( $S_{e f f} = 0$ ) indicating that the Ni spin is screened. In Sr $_{2}$ Cu $_{0.99}$ Zn $_{0.01}$ O $_{3}$ susceptibility analysis yields a defect concentration smaller than the nominal value which is in good qualitative agreement with crystal growth experiments. Influence of doping on the low-temperature long-range spin ordered state is studied. In the compound SrCuO $_{2}$ , consisting of zigzag S = $\frac{1}{2}$ chains, the influence of spin frustration on the magnetic ordering and the defect concentration determined from the susceptibility data is discussed.

11 pages, 10 figures and 3 tables

Finite-size effects in the quasi-one-dimensional quantum magnets Sr $_{2}$ CuO $_{3}$ , Sr $_{2}$ Cu $_{0.99}$ M $_{0.01}$ O $_{3}$ (M = Ni, Zn), and SrCuO $_{2}$

Abstract

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Finite-size effects in the quasi-one-dimensional quantum magnets Sr2​CuO3​, Sr2​Cu0.99​M0.01​O3​ (M = Ni, Zn), and SrCuO2​

Abstract

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Cited by in corpus (4)

Finite-size effects in the quasi-one-dimensional quantum magnets Sr $_{2}$ CuO $_{3}$ , Sr $_{2}$ Cu $_{0.99}$ M $_{0.01}$ O $_{3}$ (M = Ni, Zn), and SrCuO $_{2}$