title: Angular dependent torque measurements on CaFe0.88Co0.12AsF.
abstract: Out-of-plane angular dependent torque measurements were performed on CaFe0.88Co0.12AsF (Ca1 1 1 1) single crystals. In the normal state, the torque data shows [Formula: see text] angular dependence and H (2) magnetic field dependence, as a result of paramagnetism. In the mixed state, the torque signal is a combination of the vortex torque and paramagnetic torque, and the former allows the determination of the anisotropy parameter γ. At T   =  11.5 K, γ (11.5 K ≃ 0.5 T c)  =  19.1, which is similar to the result of SmFeAsO0.8F0.2, [Formula: see text] at [Formula: see text]. So the 11 1 1 is more anisotropic compared to 11 and 122 families of iron-based superconductors. This may suggest that the electronic coupling between layers in 1 1 1 1 is less effective than in 11 and 122 families.
authors.affiliation: Center for High Pressure Science and Technology Advanced Research, Beijing 100094, People's Republic of China.
authors.forename: H
authors.initials: H
authors.lastname: Xiao
authors.forename: B
authors.initials: B
authors.lastname: Gao
authors.forename: Y H
authors.initials: YH
authors.lastname: Ma
authors.forename: X J
authors.initials: XJ
authors.lastname: Li
authors.forename: G
authors.initials: G
authors.lastname: Mu
authors.forename: T
authors.initials: T
authors.lastname: Hu