Magnetic Resonance in the Spin-Peierls compound $\alpha'-NaV_2O_5$

TL;DR

This study uses high-frequency magnetic resonance to analyze the spin excitations in the Spin-Peierls compound $ ext{NaV}_2 ext{O}_5$, revealing temperature-dependent triplet resonances and comparing them with $ ext{CuGeO}_3$.

Contribution

It provides the first detailed high-frequency magnetic resonance characterization of $ ext{NaV}_2 ext{O}_5$, highlighting its triplet excitation spectrum and temperature dependence.

Findings

Resonances observed at high symmetry points in the excitation spectrum.

The energy of the triplet state follows the Spin-Peierls gap temperature dependence.

Comparative analysis with $ ext{CuGeO}_3$ reveals both similarities and differences.

Abstract

We present results from magnetic resonance measurements for 75-350 GHz in $\alpha$'-NaV$_{2}$O$_{5}$. The temperature dependence of the integrated intensity indicates that we observe transitions in the excited state. A quantitative description gives resonances in the triplet state at high symmetry points of the excitation spectrum of this Spin-Peierls compound. This energy has the same temperature dependence as the Spin-Peierls gap. Similarities and differences with the other inorganic compound CuGeO$_{3}$ are discussed.