Magnetic properties of geometrically frustrated SrGd2O4

Abstract

A study of the magnetic properties of the frustrated rare earth oxide SrGd2O4 has been completed using bulk property measurements of magnetization, susceptibility and specific heat on single crystal samples. Two zero-field phase transitions have been identified at 2.73 and 0.48 K. For the field, H, applied along the a and b axes, a single boundary is identified that delineates the transition from a low field, low temperature magnetically ordered regime to a high field, high temperature paramagnetic phase. Several field-induced transitions, however, have been observed with H || c. The measurements have been used to map out the magnetic phase diagram of SrGd2O4, suggesting that it is a complex system with several competing magnetic interactions. The low-temperature magnetic behavior of SrGd2O4 is very different compared to the other SrLn2O4 (Ln = Lanthanide) compounds, even though all of the SrLn2O4 compounds are isostructural, with the magnetic ions forming a low-dimensional lattice of zigzag chains that run along the c axis. The differences are likely to be due to the fact that in the ground state Gd3+ has zero orbital angular momentum and therefore the spin-orbit interactions, which are crucial for other SrLn2O4 compounds, can largely be neglected. Instead, given the relatively short Gd3+-Gd3+ distances in SrGd2O4, dipolar interactions must be taken into account for this antiferromagnet alongside the Heisenberg exchange terms.

arXiv comment10 pages, 9 figures

References in corpus (15)

• Magnetic Pyrochlore Oxides
• Properties of a classical spin liquid: the Heisenberg pyrochlore antiferromagnet
• Pyrochlore Antiferromagnet: A Three-Dimensional Quantum Spin Liquid
• Transition to Long Range Magnetic Order in the Highly Frustrated Insulating Pyrochlore Antiferromagnet Gd_2Ti_2O_7
• Structural, orbital, and magnetic order in vanadium spinels
• The phase diagram of the hexagonal lattice quantum dimer model
• Magnetic phase diagram of the antiferromagnetic pyrochlore Gd2Ti2O7
• Evidence for SrHo2O4 and SrDy2O4 as model J1-J2 zig-zag chain materials
• Coexistence of the long-range and short-range magnetic order components in SrEr${}_2$O${}_4$
• Low-temperature magnetic ordering in SrEr${}_2$O${}_4$
• Low-temperature magnetism in the honeycomb systems SrLn2O4
• Magnetic field induced ordering in SrDy2O4
• Magnetisation Studies of Geometrically Frustrated Antiferromagnets SrLn2O4, with Ln = Er, Dy and Ho
• Low temperature magnetic structure of geometrically frustrated SrHo2O4
• Novel magnetic phases in a Gd2Ti2O7 pyrochlore for a field applied along the [100] axis

Cited by in corpus (6)

• Magnetic properties of monoclinic lanthanide orthoborates, $Ln$BO${}_3$, $Ln$ = Gd, Tb, Dy, Ho, Er, Yb
• Evolution of spin correlations in SrDy2O4 in an applied magnetic field
• Absence of long range order in the frustrated magnet SrDy${}_2$O${}_4$ due to trapped defects from a dimensionality crossover
• Coexistence of magnetic fluctuations and long-range orders in the one-dimensional $J_1-J_2$ zigzag chains materials BaDy${}_2$O${}_4$ and BaHo${}_2$O${}_4$
• Magnetic structure and low temperature properties of geometrically frustrated SrNd${}_2$O${}_4$
• Magnetic structures of geometrically frustrated SrGd${}_2$O${}_4$ derived from powder and single-crystal neutron diffraction