Crystal-Field Studies of Excited States of Trivalent Neodymium in Yttrium Gallium Garnet and Yttrium Aluminum Garnet

Abstract

An analysis has been made of the position of Stark components of excited states of the trivalent neodymium ion in the aluminum garnet and gallium garnet host lattices. The crystal-field calculations reveal that not all crystal-field parameters for these states are equal. It has been found that for some states this change cannot be attributed to intermediate coupling effects or J mixing.

Crystal fields and magnetic structure of the Ising antiferromagnet Er3Ga5O12

“…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.…”

Optical spectroscopy as a tool for studying the solution chemistry of neodymium(iii)

“…In the hexagonal C 3h point group of Nd:LaCl 3 the total splitting is no more than 250 cm −1 for the 4 I 9/2 multiplet, while the same 4 I 9/2 multiplet is split by 850 cm −1 in the orthorhombic D 2(d) symmetry of a Nd:YAG laser material, see Table 7. 1,17,342 Overall, the multiplet splitting magnitude in neodymium( iii ) will be in the order of 500 cm −1 as can be expected for all the 4f-elements as indicated in Table 6. Caution is advised when reporting or comparing multiplet barycenter energies and splitting, and contrasting the actual spectra is advised.…”

“…8 Crystal field splitting of the 4 F 3/2 and 4 I 9/2 multiplets of neodymium(III) doped into a yttrium aluminium garnet. 17 The triangles represent the thermal distribution and the top of the triangle is the energy with 10% Boltzmann population at ambient temperatures (298 K, red), liquid nitrogen (77 K, orange) or liquid helium temperatures (410 K, blue).…”