Abstract
Zero-field µ+SR measurements in a ceramic sample of Ba2HoCu3O7 reveal 3D antiferromagnetic order below 5 K and some incoherent magnetic correlations up to 50 K in a decreasing volume fraction of the sample. A change of the magnetic-moment arrangement around 100 mK indicates competition between isotropic and anisotropic exchange interactions. The interpretation of the data also allows for a fairly consistent determination of the µ+-site in Ba2HoCu3O7. Since Ho3+ adopts a singlet ground state, the onset of magnetic order in the superconducting state is not à priori expected.
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Ott, H.R. et al. (1989). Magnetic Interactions in High-Tc Superconductors and Related Oxides. In: Fukuyama, H., Maekawa, S., Malozemoff, A.P. (eds) Strong Correlation and Superconductivity. Springer Series in Solid-State Sciences, vol 89. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-83836-1_33
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DOI: https://doi.org/10.1007/978-3-642-83836-1_33
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