Magnetic-Field Dependence Of The Specific-Heat Of Yba2cu3o7

Specific-heat measurements on YBa2Cu3O7 in magnetic fields to 7 T have shown the presence of Schottky anomalies with the field and temperature dependence expected for a fixed concentration of Cu2+ magnetic moments. The field-dependent part of the specific heat also includes a temperature-proportional contribution that is approximately proportional to field. These results are qualitatively different from those reported recently from another laboratory.