The influence of crystal field split impurities (Tb) on the superconducting properties of LaAl2 |
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| Authors: | G Pepperl E Umlauf A Meyer J Keller |
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| Institution: | Zentralinstitut für Tieftemperaturforschung der Bayerischen Akademie der Wissenschaften, 8046 Garching, Germany;Forschungslaboratorium der Siemens AG, 8000 München, Germany;Fachbereich Physik der Universität Regensburg, 8400 Regensburg, Germany |
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| Abstract: | The superconducting transition temperatures of the system La1-xTbxAl2 have been measured. By making use of the theory of Keller and Fulde the energy splitting between the ground state and the first excited state of Tb3+ is found to be 5 ± 1 K. Furthermore, we have determined the upper critical field Hc2(T) of these alloys and compared the results with those found for La1-xGdxAl2. In this way the influence of the crystal field splitting of Tb3+ on the critical field data is clearly demonstrated. |
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