Superconducting properties and electronic structure of CuAl2-type transition-metal zirconide Fe1-xNixZr2

Shimada R., Watanabe Y., Tortora L., Tomassucci G., HACISALİHOĞLU M. Y., Arima H., ...Daha Fazla

Journal of Alloys and Compounds, cilt.1010, 2025 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 1010
  • Basım Tarihi: 2025
  • Doi Numarası: 10.1016/j.jallcom.2024.177442
  • Dergi Adı: Journal of Alloys and Compounds
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Chemical Abstracts Core, Chimica, Communication Abstracts, Compendex, INSPEC, Metadex, Public Affairs Index, Civil Engineering Abstracts
  • Anahtar Kelimeler: Phase diagram, Specific heat, Superconductivity, Synchrotron XRD, Transition-metal zirconide
  • Recep Tayyip Erdoğan Üniversitesi Adresli: Evet

Özet

CuAl2-type transition-metal (Tr) zirconides are a superconductor family, and the Tr-site element substitution largely modifies its transition temperature (Tc). Here, we synthesized polycrystalline samples of Fe1-xNixZr2 by arc melting. The crystal structure and the superconducting properties were studied through synchrotron X-ray diffraction, magnetic susceptibility, electrical resistivity, and specific heat measurements. Bulk superconductivity was observed for 0.4 ≤ x ≤ 0.8, and the highest Tc of 2.8 K was observed for x = 0.6. The obtained superconductivity phase diagram exhibits a dome-shaped trend, which is similar to unconventional superconductors, where magnetic fluctuations are essential for superconductivity. In addition, from the c/a lattice constant ratio analysis, we show the possible relationship between the suppression of bulk superconductivity in the Ni-rich compositions and a collapsed tetragonal transition.