Anomalous thermal expansion of PrBCO compounds revisited at low temperatures
作者： Mahieddine Lahoubi , Sheng Li Pu , De Long Su
DOI: 10.1109/ASEMD.2015.7453666
关键词: Ceramic 、 Néel temperature 、 Thermal expansion 、 Condensed matter physics 、 Antiferromagnetism 、 Materials science
摘要: The low-temperature variations of the thermal expansion coefficient α(T) a non-superconducting PrBa2Cu3O6+x ceramic in two states oxygenation, x = 0.44 and 0.95 are reanalyzed using α(T)/T a(T)/T2 versus T representations. Below Neel temperature TN Pr antiferromagnetic ordering which increases respectively from 9 to 14 K, anomalies observed. first one is located at T2 ∼ 6–7 9–10 K respectively, whereas second occurs independently near Tcr(x) 4–5 K. results discussed compared with earlier experimental theoretical studies.
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