Abstract
High-resolution specific-heat measurements have been performed on an untwinned single crystal of LuBa2Cu3O7-y in an applied magnetic field, along the c axis, of up to 5 T. The zero-field data near the normal-superconducting transition temperature (Tc=92.5 K) display a very large and sharp specific-heat anomaly. Among various models for scaling the magnetic field and temperature-dependent specific-heat data, a model which incorporates the two-dimensional nature of this transition provides the best description of our data. A narrow region of crossover to three-dimensional behavior is also observed.
Original language | English (US) |
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Pages (from-to) | 11631-11634 |
Number of pages | 4 |
Journal | Physical Review B |
Volume | 47 |
Issue number | 17 |
DOIs | |
State | Published - 1993 |