Crystalline field at the rare earth ion in the erbium gallium garnet

Dreyfus, B; Verdone, J.; Veyssié, M.

doi:10.1016/0022-3697(65)90078-8

Cited by 20 publications

(2 citation statements)

References 10 publications

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“…Les courbes d'aimantation mettent en évidence une susceptibilité à saturation dont on peut obtenir l'ordre de grandeur, par un calcul de perturbations au second ordre, en utilisant le potentiel cristallin quadratique déterminé par spectrométrie infrarouge [10]. Ainsi, dans la direction [00l], la valeur expérimentale de la susceptibilité différentielle à saturation est en accord satisfaisant avec sa valeur calculée Ce calcul montre aussi que la contribution à l'aimantation à saturation due aux champs moléculaires appliqués sur les ions des divers sous-réseaux est négligeable [7].…”

Section: Classificationunclassified

Métamagnétisme du grenat d'erbium et de gallium

et al. 1972

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Appliquées 31, Toulouse (04) (Reçu le 28 septembre 1971) Résumé. 2014 L'étude expérimentale du métamagnétisme du gallate d'erbium suivant les trois directions [001], [011] et [111], à une température voisine de 0,080 °K (TN = 0,789 °K), nous a permis de déterminer le principal paramètre d'échange ainsi que le tenseur spectroscopique du doublet fondamental des ions Er3+ dans le potentiel cristallin. L'anisotropie moyenne de ce tenseur (gX ~ gY ~ 3,80, gZ ~ 11,6) ne permet pas de rendre compte des courbes d'aimantation à l'aide du modèle d'Ising.Abstract. 2014 Experimental study of the metamagnetism of erbium gallium garnet along the three directions [001 ], [011 ] and [111], at a temperature near 0.080 °K (TN = 0.789 °K), has allowed the determination of the most important exchange parameter, and of the spectroscopic tensor of the fundamental doublet of ions Er3+ in the crystalline field.The mean anisotropy of this tensor (gX ~ gY ~ 3,80 ; gZ ~ 11,6) does not allow to construe magnetization curves within Ising model.

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Section: Classificationunclassified

Métamagnétisme du grenat d'erbium et de gallium

et al. 1972

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“…While the single ion anisotropy is typically the easiest contribution to quantify, surprisingly little is known with certainty for this class of materials. Most previous crystal field studies were performed using optical spectroscopy since these materials were first investigated back in the 1960s-1970s [29][30][31][32][33][34], although it is not always straightforward to differentiate between phonons and low-lying crystal field levels with this technique. It is now understood that inelastic neutron scattering is the premier method for measuring crystal field excitations, as they can be unambiguously identified due to a momentum transfer (Q) dependence that is different from phonons.…”

Section: Introductionmentioning

confidence: 99%

Crystal fields and magnetic structure of the Ising antiferromagnet Er3Ga5O12

et al. 2019

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Rare earth garnets are an exciting playground for studying the exotic magnetic properties of the frustrated hyperkagome lattice. Here we present a comprehensive study of the single ion and collective magnetic properties of the garnet Er3Ga5O12. Using inelastic neutron scattering, we find a crystal field ground state doublet for Er 3+ with strong Ising anisotropy along local [100] axes. Magnetic susceptibility and heat capacity measurements provide evidence for long-range magnetic ordering with TN = 0.8 K, and no evidence for residual entropy is found when cooling through the ordering transition. Neutron powder diffraction reveals that the ground state spin configuration corresponds to the six-sublattice, Ising antiferromagnetic state (Γ3) common to many of the rare earth garnets. Our results indicate that Er3Ga5O12 is an excellent model system for studying the complex metamagnetism expected for a multi-axis antiferromagnet.

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B. Magnetostatic modes in YIG

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Landolt-Börnstein - Group III Condensed Matter

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Crystalline field at the rare earth ion in the erbium gallium garnet

Cited by 20 publications

References 10 publications

Métamagnétisme du grenat d'erbium et de gallium

Métamagnétisme du grenat d'erbium et de gallium

Crystal fields and magnetic structure of the Ising antiferromagnet Er3Ga5O12

B. Magnetostatic modes in YIG

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