Tuning the superconducting and magnetic properties in Fe_ySe_0.25Te_0.75 by varying the Fe-content

Journal article

The superconducting and magnetic properties of Fe$_{y}$Se$_{0.25}$Te$_{0.75}$ single crystals ($0.9\leq y \leq1.1$) were studied by means of x-ray diffraction, SQUID magnetometry, muon spin rotation, and elastic neutron diffraction. The samples with $y<1$ exhibit coexistence of bulk superconductivity and incommensurate magnetism. The magnetic order remains incommensurate for $y\geq 1$, but with increasing Fe content superconductivity is suppressed and the magnetic correlation length increases. The results show that the superconducting and the magnetic properties of the Fe$_{y}$Se$_{1-x}$Te$_{x}$ can be tuned not only by varying the Se/Te ratio but also by changing the Fe content.

Authors: Bendele, M; Babkevich, P; Katrych, S; Gvasaliya, SN; Pomjakushina, E

• Publication status: Published
• Journal: Phys. Rev. B
• Volume: 82
• Issue: 21
• Pages: 212504
• Publication date: 2010-10-04
• DOI: 10.1103/PhysRevB.82.212504
• EISSN: 1550-235X
• ISSN: 1098-0121
• Keywords: cond-mat.supr-con