Magnetic properties of monoclinic lanthanide metaborates, $Ln$(BO${}_2$)${}_3$, $Ln$ = Pr, Nd, Gd, Tb

Abstract

The bulk magnetic properties of the lanthanide metaborates, $Ln$(BO${}_2$)${}_3$, $Ln$ = Pr, Nd, Gd, Tb are studied using magnetic susceptibility, heat capacity and isothermal magnetisation measurements. They crystallise in a monoclinic structure containing chains of magnetic $L{n}^{3+}$ and could therefore exhibit features of low-dimensional magnetism and frustration. Pr(BO${}_2$)${}_3$ is found to have a non-magnetic singlet ground state. No magnetic ordering is observed down to 0.4 K for Nd(BO${}_2$)${}_3$. Gd(BO${}_2$)${}_3$ exhibits a sharp magnetic transition at 1.1 K, corresponding to three-dimensional magnetic ordering. Tb(BO${}_2$)${}_3$ shows two magnetic ordering features at 1.05 K and 1.95 K. A magnetisation plateau at a third of the saturation magnetisation is seen at 2 K for both Nd(BO${}_2$)${}_3$ and Tb(BO${}_2$)${}_3$ which persists in an applied field of 14 T. This is proposed to be a signature of quasi one-dimensional behaviour in Nd(BO${}_2$)${}_3$ and Tb(BO${}_2$)${}_3$.

18 pages, 7 figures, 2 supplementary figures, accepted for publication in Journal of Physics: Condensed Matter

References in corpus (4)

• Slow Magnetic Order-Order Transition in the Spin Chain Antiferromagnet Ca3Co2O6
• Magnetic Frustration in Lead Pyrochlores
• Structural and Magnetic Investigations of Single-Crystals of the Neodymium Zirconate Pyrochlore, Nd2Zr2O7
• Dispersionless spin waves in Gadolinium Gallium Garnet

Cited by in corpus (4)

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• Magnetic Properties of the Quasi-1D Magnesium Lanthanide Borates Mg$Ln$B${}_5$O${}_{10}$