Heat-capacity studies in the Y{sub 5{minus}{ital x}}Dy{sub {ital x}}Os{sub 4}Ge{sub 10} system
- Tata Institute of Fundamental Research, Bombay 400 005 (India)
- Dr. Babasaheb Ambedkar Marathwada University, Aurangabad 431 004 (India)
In this paper, we confirm the coexistence of superconductivity and antiferromagnetism in the Y{sub 5{minus}{ital x}}Dy{sub {ital x}}Os{sub 4}Ge{sub 10} system which forms in the tetragonal structure leading to space group {ital P}/4{ital mbm}. In an earlier study, we have reported a possible coexistence of superconductivity and antiferromagnetism from magnetic susceptibility ({chi}), resistivity, and magnetoresistance measurements in the same system. Here, we report heat-capacity ({ital C}{sub {ital p}}) and magnetization data for the same system which establish not only the bulk nature of antiferromagnetic ordering in Dy{sub 5}Os{sub 4}Ge{sub 10} but also the coexistence of bulk superconductivity and antiferromagnetism in Y{sub 2}Dy{sub 3}Os{sub 4}Ge{sub 10}. Preliminary magnetization measurements have been made on the superconductor Y{sub 5}Os{sub 4}Ge{sub 10} to estimate its lower and upper critical fields at {ital T}=0 K. Our heat-capacity data on Dy samples show considerable contribution from Schottky effect due to the crystal fields and we have proposed a model (which incorporates Ruderman-Kittel-Kasuya-Yosida exchange interaction) which fits well to the temperature dependence of {chi} and {ital C}{sub {ital p}} of all Dy samples with the same crystal-field parameters.
- OSTI ID:
- 44528
- Journal Information:
- Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 17 Vol. 51; ISSN 0163-1829; ISSN PRBMDO
- Country of Publication:
- United States
- Language:
- English
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