Magnetostriction and magnetization measurements on a DyNi2B2C single crystal in a magnetic field |
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| Institution: | 1. Instituto Federal do Maranhão, CEP 65950-000 Barra do Corda, MA, Brazil;2. Instituto de Ciências Exatas e Naturais, Universidade Federal do Pará, CEP 66075-110 Belém, PA, Brazil;3. Departamento de Física, Universidade Federal do Maranhão, CCET, CEP 65080-805 São Luis, MA, Brazil;4. Universidade Federal do Maranhão, CCSST, CEP 65900-410 Imperatriz, MA, Brazil;1. Departamento de Física, Universidade Federal do Maranhão, São Luís, MA 65080-805, Brazil;2. Universidade Regional do Cariri, Crato, CE 63105-000, Brazil;3. Departamento de Engenharia Elétrica, Universidade Federal do Maranhão, São Luís, MA 65080-805, Brazil;4. Instituto de Ciências Exatas e Naturais, Universidade Federal do Pará, Belém, PA 66075-110, Brazil |
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| Abstract: | In order to investigate the interactions between lattice properties, magnetic ordering and superconductivity of DyNi2B2C, thermal expansion, magnetostriction and magnetization measurements were performed for T=2–15 K and for μ0H=0–3 T on a single crystal in the crystallographic 1 1 0] direction. A magnetic phase diagram is derived that shows two phases (AF1 and AF2) in the narrow region between the zero-field antiferromagnetic AF and the induced ferromagnetic state FM. Moreover, it is characterized by a large-field hysteresis. This behaviour can be described by a two domain magnetic state. The metamagnetic structure AF1 with about a quarter of the saturated magnetization is responsible for suppressing the superconductivity in DyNi2B2C because of its ferromagnetic component. |
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