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Islam","submitted_at":"2018-05-11T01:25:18Z","abstract_excerpt":"We investigate the anisotropic superconducting and magnetic properties of single-crystal RbEuFe$_4$As$_4$ using magnetotransport and magnetization measurements. We determine a magnetic ordering temperature of the Eu-moments of $T_m$ = 15 K and a superconducting transition temperature of $T_c$ = 36.8 K. The superconducting phase diagram is characterized by high upper critical field slopes of -70 kG/K and -42 kG/K for in-plane and out-of-plane fields, respectively, and a surprisingly low superconducting anisotropy of $\\Gamma$ = 1.7. 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E. Koshelev, A. Rydh, D. Y. Chung, H. Claus, J.-K. Bao, K. Ryan, K. Willa, M. G. Kanatzidis, M. P. Smylie, U. Welp, W.-K. Kwok, Y. Simsek, Z. Diao, Z. Islam","submitted_at":"2018-05-11T01:25:18Z","abstract_excerpt":"We investigate the anisotropic superconducting and magnetic properties of single-crystal RbEuFe$_4$As$_4$ using magnetotransport and magnetization measurements. We determine a magnetic ordering temperature of the Eu-moments of $T_m$ = 15 K and a superconducting transition temperature of $T_c$ = 36.8 K. The superconducting phase diagram is characterized by high upper critical field slopes of -70 kG/K and -42 kG/K for in-plane and out-of-plane fields, respectively, and a surprisingly low superconducting anisotropy of $\\Gamma$ = 1.7. 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