The CuO single crystal: anomalies in the thermal expansion and the magnetostriction
Krynetskii I. B., Moskvin A. S., Naumov S. V., Samokhvalov A. A.
Several anomalies have been observed in the thermal expansion and magnetostriction of CuO single crystals. These anomalies indicate a short-range magnetic order near TN^ sr230 К and the existence of a new critical-behavior temperature, Г0^203 К. Near this temperature, field-induced magnetic phase transitions are observed. The low-temperature anomalies in ΔΙ/1 and λ{Τ) are linked with an involvement of copper-oxygen holes.