Possible coexistence of superconductivity and magnetism in intermetallic NiBi3 |
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Authors: | Esmeralda Lizet Martinez Piñeiro Roberto Escudero Lauro Bucio |
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Institution: | a Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, A. Postal 70-360, México, D.F. 04510, Mexicob Instituto de Física, Universidad Nacional Autónoma de México, México, D.F. 04510, Mexico |
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Abstract: | NiBi3 polycrystals were synthesized via a solid state method. X-ray diffraction analysis shows that the main phase present in the sample corresponds to NiBi3 in a weight fraction of 96.82 % according to the refinement of the crystalline structure. SEM - EDS and XPS analysis reveal a homogeneous composition of NiBi3, without Ni traces. The powder superconducting samples were studied by performing magnetic measurements. The superconducting transition temperature and critical magnetic fields were determined as , Oe and Oe. The superconducting parameters were , , and κ=5.136. Isothermal measurements below the transition temperature show an anomalous behavior. Above the superconducting transition the compound presents ferromagnetic characteristics up to 750 K, well above the Ni Curie temperature. |
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Keywords: | A Intermetallic alloys D Superconductivity D Ferromagnetism |
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