Electron spin resonance measurements of a demagnetizing field on the surface of metal samples

TL;DR

This study uses electron spin resonance to measure the demagnetizing fields on metal sample surfaces and determines their magnetic permeabilities, providing insights into their magnetic properties in specific conditions.

Contribution

It introduces a method to measure demagnetizing fields and magnetic permeabilities of metals using ESR signals from diamond spin-labels.

Findings

Demagnetizing fields on metal surfaces were successfully measured.

Magnetic permeabilities of Co, Fe, and Ni were determined.

The method offers a new way to analyze magnetic properties of metals.

Abstract

By comparing the signals of electron spin resonance (ESR) from two crystals of a diamond (spin-labels) the demagnetizing field of the Co, Fe, and Ni samples in the shape of strongly elongated ellipsoids of revolution (disks) has been measured. The magnetic permeabilities of the metals in the external magnetic field corresponding to the ESR of the broken chemical bonds in a natural diamond irradiated with fast reactor neutrons have been determined.