EPE of impurity ions in disordered solids distributions of the spin hamiltonian parameters

Growth, Characterization and NLO activity of Fe (III) doped Ni L-Histidine Hydrochloride Monohydrate Crystals

“…Fe (III) ions belong to d 5 electronic configuration with 6 S 5/2 ground state in the free ion and the spins are almost free to orient themselves in external magnetic field with no spin-orbit interaction [16]. When Fe +3 ions are introduced in a crystal field environment, 6 S ground state splits into three Kramer doublets.…”

Truncated forms of the second-rank orthorhombic Hamiltonians used in magnetism and electron magnetic resonance (EMR) studies are invalid—Why it went unnoticed for so long?

“…Thus here only the basic equations are provided to enable easier understanding of the nature of the intricacies involved in truncated orthorhombic ZFS Hamiltonians dealt with in Section 3. The full conventional form of H ZFS ¼ S.D.S [1][2][3][4][5][6][7][8][9], most widely used in literature and suitable for paramagnetic species with the spin SX1, may be expressed in the principal axis system (x, y, z) for monoclinic and triclinic symmetry as well as for orthorhombic symmetry as…”

“…(2) is given in the extended Stevens operators O k q (X ¼ S) defined in [28], and the associated ZFS parameters, B k q (or b k q ), now prevailing in EMR and magnetism studies [1][2][3][4][5][6][7][8][9]. For systems with the spin SX2 the higher-rank ZFS terms are required [1][2][3][4][5][6][7][8][9]. Hence, instead of the conventional notation in Eqs.…”

“…Refs. [1][2][3][4][5][6][7][8][9]). For rare-earth ions also the crystal-field (CF), or equivalently ligand field, Hamiltonians may be invoked (see, e.g.…”

“…[10][11][12][13][14][15][16][17][18][19][20]). Readers should beware of the confusion, which consists in labeling the actual ZFS quantities [1][2][3][4][5][6][7][8][9] as purportedly the CF quantities [10][11][12][13][14][15][16][17][18][19][20].…”