Resonant photon absorption and hole burning in Cr7Ni antiferromagnetic rings

TL;DR

This paper reports on microwave-induced resonant photon absorption and hole burning in Cr7Ni antiferromagnetic rings, revealing narrow absorption lines and estimating energy diffusion times through a two-pulse technique.

Contribution

It demonstrates the occurrence of narrow resonant photon absorption lines and introduces a method to estimate energy diffusion times in antiferromagnetic rings.

Findings

Narrow resonant photon absorption lines observed between 1-10 GHz.

Hyperfine interactions mainly broaden the absorption lines.

Energy diffusion time estimated using a two-pulse hole burning technique.

Abstract

Presented are magnetization measurements on a crystal of Cr7Ni antiferromagnetic rings. Irradiation with microwaves at frequencies between 1 and 10 GHz leads to observation of very narrow resonant photon absorption lines which are mainly broadened by hyperfin interactions. A two-pulse hole burning technique allowed us to estimate the characteristic energy diffusion time.