Coherent Spin Oscillations in a Disordered Magnet

Abstract

Most materials freeze when cooled to sufficiently low temperature. We find that magnetic dipoles randomly distributed in a solid matrix condense into a spin liquid with spectral properties on cooling that are the diametric opposite of those for conventional glasses. Measurements of the non-linear magnetic dynamics in the low temperature liquid reveal the presence of coherent spin oscillations composed of hundreds of spins with lifetimes up to ten seconds. These excitations can be labeled by frequency, manipulated by the magnetic fields from a loop of wire, and permit the encoding of information at multiple frequencies simultaneously.

arXiv comment11 pages, 4 figures

References in corpus (3)

• Nuclear spin driven quantum relaxation in LiY_0.998Ho_0.002F_4
• Tunable Quantum Tunneling of Magnetic Domain Walls
• Hole-burning experiments within solvable glassy models

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