Domain-Acoustic Echo with Long-Term Memory in Magnets

Three RF pulses in a number of magnetostrictive and magnetoelectric materials were inductively excited by stimulated domain-acoustic echo (DAE) with long-term acoustic memory by means of a pulsed NMR technique with inductive and electric DAE signal recording. DAE strength and magnetization dependence studies on the outer magnetic field have shown that long-term DAE memory is caused by permanent changes in magnetization in magnetostrictive and magnetoelectric materials associated with domain wall displacements or by magnetostriction in magnetite powder grains due to the acoustic wave interaction produced by the first acoustic wave interaction. The second magnetic field of the RF pulse. The findings of the comparative DAE analysis on polycrystalline ferrite, europium garnet, iron borate and magnetoelectric composite layer are discussed.

Author (s) Details

Grigor Mamniashvili
Department of Condensed Matter Physics at Ivane Javakhishvili Tbilisi State University Andronikashvili Institute of Physics, 6 Tamarashvili St. 0177, Tbilisi, Georgia.

Tatiana Gegechkori
Department of Condensed Matter Physics at Ivane Javakhishvili Tbilisi State University Andronikashvili Institute of Physics, 6 Tamarashvili St. 0177, Tbilisi, Georgia.

Tsisana Gavasheli
Faculty of Exact and Natural Sciences at Ivane Javakhishvili Tbilisi State University, 1, Chavchavadze Av., Tbilisi, 0179, Georgia.

Zurab Shermadini
Faculty of Exact and Natural Sciences at Ivane Javakhishvili Tbilisi State University, 1, Chavchavadze Av., Tbilisi, 0179, Georgia.

View Book :- https://bp.bookpi.org/index.php/bpi/catalog/book/349

Leave a Reply

Your email address will not be published. Required fields are marked *