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- W1972791466 abstract "(Dy0.375Y0.625)2Cu2O5 is an antiferromagnet below TN = 11 K, displaying many signs of low-dimensional magnetism. Electron paramagnetic resonance (EPR) investigation of different magnetic interactions in (Dy0.375Y0.625)2Cu2O5 solid solution is carried out by analysis of thermal evolution of EPR spectral parameters (integrated intensity, effective resonance field, effective linewidth) evaluated in the paramagnetic phase. A model, proposed earlier to explain metamagnetic transitions in the anntiferromagnetic phase was used to interpret the observed magnetic behaviour. Manifestations of copper chains existing in the (Dy0.375Y0.625)2Cu2O5 structure has been found in the EPR spectrum and the values of appropriate exchange constants connected with a hierarchy of exchange interactions has been calculated. At about 40 K a dimensional crossover from 2D to 3D behaviour has been observed in the temperature dependence of the product of the EPR integrated intensity and temperature. At high temperatures (T > 200 K) the EPR spectrum is suggestive of the presence of defect centres consisting of antferromagnetically coupled copper spins, forming dimers with the S = 0 ground state. (© 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)" @default.
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- W1972791466 date "2007-03-01" @default.
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- W1972791466 title "Competing magnetic interactions in (Dy0.375Y0.625)2Cu2O5 solid solution studied by EPR" @default.
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- W1972791466 doi "https://doi.org/10.1002/pssb.200642419" @default.
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