MAGNETOACOUSTIC INTERFEROMETRY OF METASTABLE STATES IN Dy3Al5O12 J. F. Gregg, I. D. Morris, M. R. Wells et W. P. Wolf J. Phys. Colloques, 49 C8 (1988) C8-2027-C8-2028 DOI: 10.1051/jphyscol:19888921