Nonconventional Spin Glass Transition in a Chemically Ordered Pyrochlore

Abstract

We report on the study of unusual spin glass properties in the geometrically frustrated pyrochlore Tb${}_2$Mo${}_2$O${}_7$, $T$${}_g$$\simeq$24 K. The analysis of the nonlinear part of dc and complex susceptibilities, near the glass transition regime, suggests the existence of a statistical distribution of relaxation times in short-range ordered ferromagnetic clusters. In addition, the magnetic spins are not sufficiently frozen below the glass transition temperature; apparently, responsible for the non-equilibrium scaling behavior of the static critical exponents of nonlinear susceptibilities. Our report is expected to shed new light in understanding the freezing properties of frustrated pyrochlores with short range ferromagnetic interactions.

5 pages, 4 figures

References in corpus (3)

• Spin Dynamics of the Spin-1/2 Kagome Lattice Antiferromagnet ZnCu_3(OH)_6Cl_2
• Low temperature dynamic freezing and the fragility of ordering in Tb2Sn2O7
• Spin Correlations in the Geometrically Frustrated Pyrochlore Tb2Mo2O7

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