Photopyroelectric study of the thermal parameters of antiferromagnets at the Neel temperature M. Marinelli, F. Mercuri, U. Zammit, R. Pizzoferrato, F. Scudieri and D. Dadarlat J. Phys. IV France, 04 C7 (1994) C7-261-C7-266 DOI: 10.1051/jp4:1994762