Angular-dependent upper critical field of overdoped Ba(Fe ${}_{1-x}$ Ni ${}_x$ ) ${}_2$ As ${}_2$

Journal Article · Thu Mar 07 00:00:00 EST 2013 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.87.094505· OSTI ID:1082852

Murphy, J.; Tanatar, M. A.; Graf, D.; Brooks, J. S.; Bud'ko, S. L.; Canfield, P. C.; Kogan, V. G.; Prozorov, R.

In-plane resistivity measurements as a function of temperature, magnetic field, and its orientation with respect to the crystallographic ab plane were used to study the upper critical field, Hc2, of two overdoped compositions of the iron-based superconductor Ba(Fe1-xNix)2As2, x=0.054 and x=0.072. Measurements were performed using precise alignment (with accuracy less than 0.1°) of magnetic field with respect to the Fe-As plane. The dependence of the Hc2 on angle θ between the field and the ab plane was measured in isothermal conditions in a broad temperature range. We found that the shape of Hc2(θ) clearly deviates from the Ginzburg-Landau functional form.

• Research Organization: Ames Lab., Ames, IA (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC02-07CH11358
• OSTI ID: 1082852
• Report Number(s): IS-J 7955; PRBMDO
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Vol. 87, Issue 9; ISSN 1098-0121
• Publisher: American Physical Society (APS)
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY