Penetration depths of superconducting U6X (X = Fe,Co, Mn) |
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| Affiliation: | 1. Department of Physics, National Sun Yat-sen University, Kaohsiung City, Taiwan;2. NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA;3. Department of Applied Physics, National University of Kaohsiung, Kaohsiung, Taiwan;4. Department of Physics, Faculty of Science, Kalinga University, Atal Nagar-Nava Raipur, Chhattisgarh, 492101, India;5. General Education Center, Wenzao Ursuline University of Languages, Kaohsiung, Taiwan;6. Center for Condensed Matter Sciences, National Taiwan University, Taipei, Taiwan;7. Department of Physics, National Chung Cheng University, Chiayi, 62102, Taiwan;8. National Synchrotron Radiation Research Center, Hsinchu, Taiwan;9. M.N. Mikheev Institute of Metal Physics, Ural Division of Russian Academy of Sciences (UD RAS), Ekaterinburg, Russia;1. Department of Medical Oncology, Dana-Farber Cancer Institute, 450 Brookline Avenue, Boston, MA 02115, USA;2. Department of Medicine, Beth Israel Deaconess Medical Center, 330 Brookline Avenue, Boston, MA 02115, USA;3. Harvard Medical School, 25 Shattuck Street, Boston, MA 02115, USA;4. Center of Molecular and Cellular Oncology, Yale Cancer Center, Yale School of Medicine, 300 George Street, Suite 6400, New Haven, CT 06510, USA;5. Department of Medicine, Brigham and Women''s Hospital, 75 Francis Street, Boston, MA 02115, USA |
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| Abstract: | The penetration depths, λ(T), of the heavy-fermion uranium-based superconductors U6X (X = Fe, Co, Mn) have been measured as a function of temperature at ∼ 35 MHz. It was found that the temperature dependence of λ(T) for these compounds agrees well with the BCS theory. However, the values of λ(0) are large. By comparing the Slater-Pauling curve of the X elements with λ(0)-1 for the U6X superconductors, we have found that λ(0)-1 is proportional to the saturation spin moments of elemental X, suggesting that there is a correlation between the superconductivity of these U6X superconductors and the magnetic nature of the X elements. |
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