Paramagnetic resonance in yttrium gallium garnet: Co<sup>2+</sup>and Mn<sup>2+</sup>

Chamberlain, J.R.; Cooper, R. W.

doi:10.1088/0370-1328/87/4/313

Cited by 15 publications

(4 citation statements)

References 10 publications

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“…For example, when Cok is substituted for Ti4" isotropies too small to be measured (7). Also, A for Co than A for Co2+ in the distorted octahedral site of YGaG (5 to the T1 cubic ground state we 688 that the tetragonal eplitting cawed by the elongation leave6 the orbital singlet lower than the orbital doublet.…”

Section: K22 Physica Statue Solidi @) 43mentioning

confidence: 67%

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EPR of Co²⁺ in KTaO₃

Hannon

1971

Physica Status Solidi (b)

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Section: K22 Physica Statue Solidi @) 43mentioning

confidence: 67%

“…Fi + (about the same size as Ta ) in BaTiO the g-values and hyperfine values have an- 3 isotropies too small to be measured (7). Also, A for Co than A for Co2+ in the distorted octahedral site of YGaG (5). result^ (3, 5).…”

Section: The Comentioning

confidence: 95%

EPR of Co²⁺ in KTaO₃

Hannon

1971

Physica Status Solidi (b)

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“…The results on octahedral Co 2+ have been briefly reported before by ourselves and other workers. 18,19 We are unable to identify any spectra of dodechedral cobalt. We find that, whereas it is easy to drive the cobalt divalent, and to eliminate Co 3+ , by addition of silicon, [1][2][3][4][5][6][7][8] only a very small fraction of the cobalt goes quadrivalent on the addition of calcium.…”

Section: Introductionmentioning

confidence: 89%

Magnetic Behavior of Cobalt in Garnets. I. Spin Resonance in Cobalt-Doped Yttrium Gallium Garnet

Sturge¹,

Merritt²,

Hensel³

et al. 1969

Phys. Rev.

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We have studied the spin resonance at 24 and 56 kMc/sec of cobalt in single crystals of yttrium gallium garnet (YGaG). We find resonances associated with four different combinations of site and charge state. Tetrahedral Co 2+ has the M 2 ground term with the tetragonal splitting parameter 2J9= -36 cm -1 . Octahedral Co 2+ has the 4 7\ ground term with the trigonal splitting A t = +650 cm -1 . It is seen in otherwise pure YGaG, as well as in crystals counterdoped with Si 4+ . Tetrahedral Co 3+ has the 5 E ground term, with Z>^14 cm -1 , |»| =0.66 cm -1 . This value of a, the fourth-order cubic field-splitting parameter, is exceptionally large and makes possible strong magnetic-dipole transitions between states with S z~± :2. Electric-dipole transitions are also observed between these states. Octahedral Co 4+ has the strong-field 2 Ti ground term, with A* = +1000 cm -1 ; its spectrum is very weak relative to Co 3+ , even in crystals counterdoped with Ca 2+ . The absence of a resonance from octahedral Co 3+ implies that this ion has the strong-field l A i ground term. Cobalt does not appear to enter the dodecahedral site in our crystals. Our results are complementary to, and on the whole consistent with, the optical data of Wood and Remeika. We review the information available on crystal fields at the octahedral and tetrahedral sites in garnet, and on the hyperfine structure of cobalt.

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“…It is generally found, however, that a given paramagnetic ion will enter only one of the three sites and to date onlyone example that of S-state trivalent iron has been reported where an ion has been found to enter two of the available sites (octahedral and tetrahedral) [lo, 111. Trivalent gadolinium is found to enter only the dodecahedral site [12,13] and divalent manganese sub-stituted into yttrium gallium garnet (YGaG) has been reported to enter only the octahedral site [14].…”

Section: Introductionmentioning

confidence: 99%

Electron Paramagnetic Resonance of Mn²⁺ at the Three Sites of Yttrium Aluminium Garnet

Hodges

Dormann

Makram

1969

Physica Status Solidi (b)

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Electron paramagnetic resonance measurements have been made at 17.4 GHz at room and liquid helium temperatures of divalent manganese substituted into the three sites of yttrium aluminium garnet (YAlG). The relative intensities of the tetrahedral, octahedral, and dodecahedral spectra were respectively 3 : 2 : 30. Data a t liquid helium temperatures in units of Die Nullfeldaufspaltungen zweiter Ordnung wurden mit den verschiedenen existierenden KristallfeIdmodellen verglichen, wobei an den drei Platzen das lokale Kristallfeld benutzt wurde, das durch die Aufsummierung der Beitrage der Punktladungen bis zur Konvergenz erhalten wurde. Nur schlechte ubereinstimmung wurde erhalten.v. -.

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Paramagnetic resonance in yttrium gallium garnet: Co²⁺and Mn²⁺

Cited by 15 publications

References 10 publications

EPR of Co²⁺ in KTaO₃

EPR of Co²⁺ in KTaO₃

Magnetic Behavior of Cobalt in Garnets. I. Spin Resonance in Cobalt-Doped Yttrium Gallium Garnet

Electron Paramagnetic Resonance of Mn²⁺ at the Three Sites of Yttrium Aluminium Garnet

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Paramagnetic resonance in yttrium gallium garnet: Co2+and Mn2+

Cited by 15 publications

References 10 publications

EPR of Co2+ in KTaO3

EPR of Co2+ in KTaO3

Magnetic Behavior of Cobalt in Garnets. I. Spin Resonance in Cobalt-Doped Yttrium Gallium Garnet

Electron Paramagnetic Resonance of Mn2+ at the Three Sites of Yttrium Aluminium Garnet

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Paramagnetic resonance in yttrium gallium garnet: Co²⁺and Mn²⁺

EPR of Co²⁺ in KTaO₃

EPR of Co²⁺ in KTaO₃

Electron Paramagnetic Resonance of Mn²⁺ at the Three Sites of Yttrium Aluminium Garnet