Abstract
Amplification of echo signals in ordered magnetic materials was postulated by many authors in the middle sixties. However, theoretical estimates of amplification were invariably several orders of magnitude higher than observed in ferrimagnetic materials. We have reformulated the equation of motion to include the nonlocal dipole-dipole interaction to describe the dynamic response of an echo. Our estimates of amplification compare reasonably well with measured values.
Keywords
ferrimagnetic echoes, amplification of echo signals, equation of motion, dipole interaction
Subject Categories
Magnetic materials
Disciplines
Electromagnetics and photonics
Publisher
American Physical Society
Publication Date
3-25-1991
Rights Information
Copyright 1991 American Physical Society
Rights Holder
American Physical Society
Permanent URL
Recommended Citation
How, H. and Vittoria, C., "Theory of amplified ferrimagnetic echoes" (1991). Electrical and Computer Engineering Faculty Publications. Paper 132. http://hdl.handle.net/2047/d20002303
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Notes
Originally published in Physical Review Letters 66, 1626-1629 (1991). doi 10.1103/PhysRevLetters66.1626 (http://link.aps.org/doi/10.1103/PhysRevLetters66.1626).