MAGNETOELASTIC EFFECTS IN NICKEL SINGLE CRYSTALS STUDIED BY ULTRASONIC ATTENUATION AND VELOCITY A. ZIELINSKI, C. BECKER, G. DIETZ, D. LENZ et K. LÜCKE J. Phys. Colloques, 48 C8 (1987) C8-463-C8-468 DOI: 10.1051/jphyscol:1987871