Absence of magnetic ordering and field induced phase diagram in the Gadolinium Aluminium garnet

Abstract

The robustness of spin liquids with respect to small perturbations, and the way magnetic frustration can be lifted by slight changes in the balance between competing magnetic interactions remains a rich and open issue. We address this question through the study of the Gadolinium Aluminium garnet Gd${}_3$Al${}_5$O${}_{12}$, a related compound to the extensively studied Gd${}_3$Ga${}_5$O${}_{12}$. We report on its magnetic properties at very low temperature. We show that despite a freezing at about 300 mK, no magnetic transition is observed, suggesting the presence of a spin liquid state down to the lowest temperatures similarly to Gd${}_3$Ga${}_5$O${}_{12}$, in spite of a larger ratio between exchange and dipolar interactions. Finally, the phase diagram as a function of field and temperature is strongly reminiscent from the one reported in Gd${}_3$Ga${}_5$O${}_{12}$. This study reveals the robust nature of the spin liquid phase for Gd ions on the garnet lattice in stark contrast to Gd ions on the pyrochlore lattice for which a slight perturbation drives the compound into a range of magnetically ordered states.

5 pages, 5 figures

References in corpus (7)

• Spin-Liquid State in the S = 1/2 Hyperkagome Antiferromagnet Na4Ir3O8
• Magnetic ordering in Gd2Sn2O7: the archetypal Heisenberg pyrochlore antiferromagnet
• Short-range correlations in the magnetic ground state of Na4Ir3O8
• Dispersionless spin waves in Gadolinium Gallium Garnet
• Updating the phase diagram of the archetypal frustrated magnet Gd3Ga5O12
• Field induced magnetic order in the frustrated magnet Gadolinium Gallium Garnet
• Anisotropic phase diagram and spin fluctuations of the hyperkagome magnet Gd3Ga5O12 as revealed by sound velocity measurements