标题: | ANOMALOUS PR ORDERING IN THE NEW TLBA2PRCU2O7-DELTA COMPOUND |
作者: | LAI, CC CHIOU, BS CHEN, YY HO, JC KU, HC 电控工程研究所 Institute of Electrical and Control Engineering |
公开日期: | 1-十一月-1992 |
摘要: | Magnetic measurements on the new tetragonal Tl(1212) compound TlBa2PrCu2O7-delta (a = 3.910 angstrom and c = 12.53 angstrom) reveal an anomalously high antiferromagnetic Neel temperature T(N) congruent-to 8 K. This transition temperature is higher than T(N) = 2.2 K for isostructural TlBa2GdCu2O7-delta. Corroborative evidence comes from calorimetric studies, in which a magnetic entropy was obtained DELTAS congruent-to 0.5 Rln 2 between 2 and 10 K, as well as a sizeable linear term in specific heat comparable to those found in heavy-fermion systems. Through structural consideration, these observations can not only be correlated to the almost identical but still puzzling features of PrBa2Cu3O7-y, but also remove some ambiguity in the interpretation of earlier results. |
URI: | http://hdl.handle.net/11536/3246 |
ISSN: | 0921-4534 |
期刊: | PHYSICA C |
Volume: | 202 |
Issue: | 1-2 |
起始页: | 104 |
结束页: | 108 |
显示于类别: | Articles |