ACTA

Magnetic Studies of EuBa₂Cu_3-xRu_xO_7-δ Compounds

A. Dvurečenskij^a, A. Cigáň^a, R. Bystrický^a,b, M. Škrátek^a, P. Billik^a, M. Majerová^a and J. Maňka^a
^aInstitute of Measurement Science, Slovak Academy of Sciences, Dúbravská cesta 9, 841 04 Bratislava, Slovakia
^bInstitute of Inorganic Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 841 04 Bratislava, Slovakia

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Effects of Ru addition on magnetic properties of EuBa₂Cu_3-xRu_xO_7-δ compounds were studied. Samples of EuBa₂Cu_3-xRu_xO_7-δ with x from 0.00 to 0.70 were prepared by the solid state reaction technique from Eu₂O₃, BaCO₃, CuO and RuO₂ precursors. Temperature dependences of the zero-field cooled (ZFC) and the field cooled (FC) DC magnetic moment at low and high applied magnetic field H_a were measured by the QD SQUID magnetometer MPMS XL-7 and AC magnetization M_AC(H) curves at 77 K by the compensation method using the second-order SQUID gradiometer. The molar susceptibility χ of the samples was corrected to the effects of the sample holder and diamagnetism and χ^* also was corrected to the temperature independent paramagnetic/diamagnetic contribution χ^TN and fitted by the Curie-Weiss relation. The values of the Weiss temperature and the effective magnetic moment have been estimated at low and high value of applied magnetic field.

DOI: 10.12693/APhysPolA.127.300
PACS numbers: 74.72.-h, 74.25.Ha, 75.30.Et, 75.60.-d