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Magnetic Properties of La₃Ga_{5.5}Ta_{0.5}O₁₄ Single Crystals Doped with Sm³⁺ and Er³⁺ Ions

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Kaczmarek S., Leniec G., Berkowski M., Kazan S., Acikgoz M.

Acta Physica Polonica A

2017

vol. 131

issue 3

366-369

Electron paramagnetic resonance and magnetic susceptibility measurements were performed for two La₃Ga_{5.5}Ta_{0.5}O₁₄ single crystals doped with 1.96 at.% of Sm³⁺ ions and 3.8 at.% of Er³⁺ ions. Two magnetically inequivalent sites were found to be responsible for the electron paramagnetic resonance spectra of Sm³⁺ ions. Both sites reveal a low (at least C₂) symmetry with g_{x}~0.46, g_{y}~0.46 and g_{z}~0.52. The symmetry of isolated erbium ions is higher than C₂. From electron paramagnetic resonance and magnetic susceptibility experiments it results that the ground state of Er³⁺ ions is Γ⁶ or Γ⁷. Below 51 K electronic transitions within Γ⁶ doublets take place. Between 51 and 60 K, Γ⁶ to Γ⁷ transitions dominate, while above 60 K mainly transitions within Γ⁷ doublet are active.

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1 Acta Physica Polonica A

1 2017

1 Acikgoz M.

1 Berkowski M.

1 Kaczmarek S.

1 Kazan S.

1 Leniec G.

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Magnetic Properties of La₃Ga_{5.5}Ta_{0.5}O₁₄ Single Crystals Doped with Sm³⁺ and Er³⁺ Ions