Experimental measurement of the isolated magnetic susceptibility

Abstract

The isolated susceptibility ${\chi }_{\mathrm{I}}$ may be defined as a (non-thermodynamic) average over the canonical ensemble, but while it has often been discussed in the literature, it has not been clearly measured. Here, we demonstrate an unambiguous measurement of ${\chi }_{\mathrm{I}}$ at avoided nuclear-electronic level crossings in a dilute spin ice system, containing well-separated holmium ions. We show that ${\chi }_{\mathrm{I}}$ quantifies the superposition of quasi-classical spin states at these points, and is a direct measure of state concurrence and populations.

9 pages, & figures

References in corpus (5)

• Low Temperature Spin Freezing in Dy2Ti2O7 Spin Ice
• A.C. susceptibility as a probe of low-frequency magnetic dynamics
• Brownian Motion and Quantum Dynamics of Magnetic Monopoles in Spin Ice
• Cross-relaxation and phonon bottleneck effects on magnetization dynamics in LiYF4:Ho3+
• Landau-Zener transition in a continuously measured single-molecule spin transistor