Title :

Magneto-acoustic ceramics for parametric sound wave phase conjugators

Author(s) :

Brysev, Andrey [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Pernod, Philippe [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Preobrazhensky, Vladimir [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]

Journal title :

Ultrasonics

Pages :

834-837

Publisher :

Elsevier

Publication date :

2000

ISSN :

0041-624X

English keyword(s) :

Gain increment
Magnetostrictive ferrite
Output power
Phase conjugation
Pumping depletion
Ultrasound

HAL domain(s) :

Sciences de l'ingénieur [physics]

English abstract : [en]

The paper reflects the recent experimental results on the elaboration and study of active materials for magneto-acoustic phase conjugators (MAPCs). The results of complex measurements of MAPC parameters are demonstrated ...
Show more >The paper reflects the recent experimental results on the elaboration and study of active materials for magneto-acoustic phase conjugators (MAPCs). The results of complex measurements of MAPC parameters are demonstrated on typical samples of NiFe2O4 magnetostrictive ceramics. The mechanism of strong dispersion of gain increments and output power of MAPCs is studied and explained by dispersion of critical values of the parametric modulation depth of sound velocity. A maximum output power 240 W at frequency 5 MHz is obtained for active element MAPC with critical current Ic=9 A and electrical Q-factor equal to 80.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Collections :

• Institut d'Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520

Source :

Harvested from HAL