Magnetic and spectral properties of multi-sublattice oxides SrY2O4:Er3+ and SrEr2O4

Abstract

SrEr2O4 is a geometrically frustrated magnet which demonstrates rather unusual properties at low temperatures including a coexistence of long- and short-range magnetic order, characterized by two different propagation vectors. In the present work, the effects of crystal fields (CF) in this compound containing four magnetically inequivalent erbium sublattices are investigated experimentally and theoretically. We combine the measurements of the CF levels of the Er3+ ions made on a powder sample of SrEr2O4 using neutron spectroscopy with site-selective optical and electron paramagnetic resonance measurements performed on single crystal samples of the lightly Er-doped nonmagnetic analogue, SrY2O4. Two sets of CF parameters corresponding to the Er3+ ions at the crystallographically inequivalent lattice sites are derived which fit all the available experimental data well, including the magnetization and dc susceptibility data for both lightly doped and concentrated samples.

arXiv comment14 pages, 9 figures

References in corpus (12)

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Cited by in corpus (11)

• Absence of long range order in the frustrated magnet SrDy${}_2$O${}_4$ due to trapped defects from a dimensionality crossover
• Evolution of spin correlations in SrDy2O4 in an applied magnetic field
• Field dependence of the magnetic correlations of the frustrated magnet SrDy${}_2$O${}_4$
• Super-Necking Crystal Growth and Structural and Magnetic Properties of SrTb${}_2$O${}_4$ Single Crystals
• Evidence for spin liquid ground state in SrDy${}_2$O${}_4$ frustrated magnet probed by muSR
• 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
• Crystal field effects in the zig-zag chain compound SrTm${}_2$O${}_4$
• Thermodynamics and spin mapping of quantum excitations in a Heisenberg spin heptamer
• Magnetic properties of the zigzag ladder compound SrTb2O4