Transport and magnetic properties of La-doped CaFe${}_2$As${}_2$

Abstract

We measured the transport properties and susceptibility of single crystals Ca${}_{1-x}$La${}_x$Fe${}_2$As${}_2$(x=0, 0.05, 0.1, 0.15, 0.19 and 0.25). Large in-plane resistivity anisotropy similar to that in Co-doped 122 iron-pnictides is observed although no transition metals were introduced in the FeAs-plane. The in-plane resistivity anisotropy gradually increases with La doping below T${}_{SDW}$, being different from the hole-doped 122 superconductors. The susceptibilities of the samples show that La doping leads to suppression of SDW and induces a Curie-Weiss-like behavior at low temperature, which is much stronger than the other 122 iron-based superconductors.

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Cited by in corpus (3)

• Simultaneous Vanishing of the Nematic Electronic State and the Structural Orthorhombicity in NaFe${}_{1-x}$Co${}_x$As Single Crystals
• Phase Diagram and Weak-link Behavior in Nd-doped CaFe_2As_2
• Evolution of Critical Current Density in CaKFe${}_4$As${}_4$ with La-doping