Phys. Rev. B 46, 11772 (1992)

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Magnetic properties of La₂Cu_1-xM_xO₄ with M=Zn and Ni

S. T. Ting, P. Pernambuco-Wise, J. E. Crow, and E. Manousakis

Department of Physics and Center for Materials Research and Technology, Florida State University, Tallahassee, Florida 32306

J. Weaver

Physics Department, Temple University, Philadelphia, Pennsylvania 19122

The temperature (1.8 <= T <= 400 K) and concentration (0 <= x <= 0.10) dependence of the magnetization and magnetic susceptibility of La₂Cu_1-xM_xO₄ with M=Zn and Ni have been measured. The results are compared with the recent measurements of the concentration (0 <= x <= 0.10) dependence of the muon spin rotation of La₂Cu_1-xZn_xO₄. The antiferromagnetic order present in La₂CuO₄, which is very sensitive to the introduction of impurities which create mobile holes (such as Sr substitution of the La site), is much less sensitive to impurities which do not create mobile holes in the CuO₂ planes. The Néel temperature T_N is depressed rapidly with Zn doping and the width of the peak in the susceptibility increases with x, and thus the peak becomes less well defined. The depression of T_N in Ni-doped La₂CuO₄ and the increase in the width of the susceptibility peak are less rapid compared to those in the Zn-doped material. We also study the influence of doping on the metamagnetic behavior which is concomitant with the antiferromagnetism in these systems.

©1992 The American Physical Society.

PACS: 74.70.Hk

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