ACTA

Influence of Co Doping on Crystal and Magnetic Properties of Gd₂Cu₂In

Ł. Gondek^a, A. Szytuła^b, D. Kaczorowski^c, A. Szewczyk^d, M. Gutowska^d, Yu. Tyvanchuk^e and Ya.M. Kalychak^e
^aFaculty of Physics and Applied Computer Science, AGH University of Science and Technology, al. A. Mickiewicza 30, 30-059 Kraków, Poland
^bM. Smoluchowski Institute of Physics, Jagiellonian University, W.S. Reymonta 4, 30-059 Kraków, Poland
^cW. Trzebiatowski Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 1410, 50-950 Wrocław, Poland
^dInstitute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warszawa, Poland
^eDepartment of Inorganic Chemistry, Ivan Franko National University of Lviv, Kyryla i Metodiya 6, UA-79005 Lviv, Ukraine

Received: February 7, 2012

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Physical properties of Gd₂Cu_{2 - x}Co_xIn (x = 0.1, 0.2, 0.3) samples are investigated. The paper brings results of X-ray diffraction, magnetometric as well as specific heat studies. It was found that only sample with x = 0.1 exhibits desired crystal structure. Other compositions show existence of impurities due to lack of dissolution Co atoms. For Gd₂Cu_1.9Co_0.1In sample the Curie temperature of 92.5 K was evidenced. Thus, an enhancement of ferromagnetic correlations with comparison to Gd₂Cu₂In sample was evidenced. It was found that Gd₂Cu_1.9Co_0.1In sample exhibits magnetocaloric effect within broad temperature range.

DOI: 10.12693/APhysPolA.122.216
PACS numbers: 75.30.-m, 75.30.Kz, 75.50.Ee