Influence of pulsed magnetic field on single- and two-pulse nuclear spin echoes in multidomain magnets

TL;DR

This study investigates how pulsed magnetic fields affect nuclear spin echoes in various magnetic materials, revealing mechanisms of echo formation and how domain wall parameters influence magnetic pulse effects.

Contribution

It demonstrates the analogy of magnetic pulse influence on echoes in certain magnets and introduces domain wall parameters as tools for magnetic material characterization.

Findings

Analogous pulse influence observed in some magnets

Absence of analogy in lithium ferrite due to different echo formation mechanism

Pulse timing and frequency diagrams relate to domain wall parameters

Abstract

By the method of additional pulsed magnetic field influence in different magnetic materials (half metals, manganites, lithium ferrite, cobalt) it is established the analogy of time diagrams of magnetic pulse influence on single- and two pulse echoes in magnets when the distortion mechanism of single-pulse echo formation is effective, and the absence of such analogy in the case of lithium ferrite where the multipulse mechanism of single-pulse echo formation is effective. It is shown also that the timing and frequency diagrams of magnetic pulse influence on the two-pulse echo signals, corresponding to the symmetric and asymmetric magnetic pulse applications in the studied magnets, are defined by their domain walls parameters and could serve for their qualitative and quantitative characterization.