Effects of low magnetic fields in transient spectral hole-burning of the R1-line in emerald, Be3Al2Si6O18:Cr(III)

Riesen, Hans

doi:10.1016/j.cplett.2003.10.116

Cited by 5 publications

(11 citation statements)

References 16 publications

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“…Vice versa, the 20 ppm ruby would correspond to 160 ppm emerald. We note here that no side-to anti-hole conversion was observed in work on 0.04% emerald [20].…”

Section: Discussionmentioning

confidence: 52%

“…The solid lines are fits to Eqs. (4), and (19) and (20) for the hole in zero field and the resonant hole and the side hole at À540 MHz in a field, respectively. 11.…”

Section: Article In Pressmentioning

confidence: 99%

“…9 and 11 are well described by Eqs. (4), (19) and (20). In the fit for the zero-field data the excited lifetime was fixed at 3.75 ms.…”

Section: Article In Pressmentioning

confidence: 99%

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Side-hole to anti-hole conversion in time-resolved spectral hole burning of ruby: Long-lived spectral holes due to ground state level population storage

Riesen

Hayward

Szabó

2007

Journal of Luminescence

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We report time-resolved transient spectral hole burning of Verneuil-grown 20 ppm and ca. 0.6 ppm ruby (Al 2 O 3 :Cr 3+ ) in zero field and low magnetic fields BJc at 4 K. The hole-burning spectroscopy of the 20 ppm sample implies relatively rapid cross relaxation in the 4 A 2 ground state on the $1 ms timescale both in zero field and in low magnetic fields, BJc, up to 0.2 T. In the 0.6 ppm sample, side-hole to anti-hole conversion is observed both in zero field and in low magnetic fields. This conversion is caused by population storage in 4 A 2 ground state levels. Spin-lattice relaxation, on the 200 ms timescale, is directly observed from the time dependence of the resonant hole and anti holes in BJc, consistent with a very low cross-relaxation rate. However, in zero field cross relaxation in the 4 A 2 ground state is still a significant relaxation mechanism for the 0.6 ppm sample resulting in hole decay in $50 ms. r

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“…Vice versa, the 20 ppm ruby would correspond to 160 ppm emerald. We note here that no side-to anti-hole conversion was observed in work on 0.04% emerald [20].…”

Section: Discussionmentioning

confidence: 52%

“…The solid lines are fits to Eqs. (4), and (19) and (20) for the hole in zero field and the resonant hole and the side hole at À540 MHz in a field, respectively. 11.…”

Section: Article In Pressmentioning

confidence: 99%

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Side-hole to anti-hole conversion in time-resolved spectral hole burning of ruby: Long-lived spectral holes due to ground state level population storage

Riesen

Hayward

Szabó

2007

Journal of Luminescence

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“…The mechanism responsible for persistent spectral hole-burning in natural emerald, originally observed by Rigby et al in 1992, 21 is believed to be related to the presence of such impurities, as the Chatham created emeralds exhibit only transient spectral hole-burning. 11 In the present work we report time-resolved transient spectral hole-burning experiments in low magnetic fields on Chatham created beryl containing 0.0017% per weight chromium (III). The application of laser diodes facilitates the acquisition of high quality data, allowing the simultaneous determination of g-factors and spin-lattice relaxation times in the ground state and the excited state.…”

Section: Introductionmentioning

confidence: 94%

“…We have recently reported significant temperature dependences, between 2.5 and 8 K, in transient spectral hole-burning of pale green Chatham created emerald (0.04% Cr(III)) in low magnetic fields. 11 We have tentatively assigned these dependences to spin-lattice and cross relaxation effects, but have pointed out that time-resolved transient hole-burning measurements are needed to fully rationalize the observed phenomena.…”

Section: Introductionmentioning

confidence: 99%

Side-hole to anti-hole conversion in time-resolved transient spectral hole-burning of emerald: ground state level versus excited state population storage in low magnetic fields

Hayward

Riesen

2005

Phys. Chem. Chem. Phys.

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Time-resolved transient spectral hole-burning experiments in zero field and in low magnetic fields B( parallelc) are reported for the chromium(III) R(1)-line, 2A((2)E)<-- 2A((4)A(2)) of Chatham lab created emerald, Be(3)Al(2)Si(6)O(18)ratio Cr(III)(0.0017% per weight), in the temperature range of 3 to 12 K. In low magnetic fields and temperatures >5 K conversion of side-holes to anti-holes is observed with progressing time. Anti-holes are due to the population stored in ground state levels. The dynamics of the hole pattern can be well modelled by a set of coupled differential equations for the levels of the (4)A(2) and (2)E multiplets. The measurements allow the simultaneous determination of g-factors and spin-lattice relaxation rates in the excited state and the ground state. At 6 K the relaxation times between the split +/-1/2 2A((2)E) excited state levels and +/-3/2 2A((4)A(2)) levels of the ground state are about 0.16 ms and 9 ms, respectively. From the temperature dependence it follows that the spin-lattice relaxation rates are dominated by Orbach processes in the experimental temperature range.

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Studies of the g factors of the ground 4A2 and the first excited 2E state of Cr3+ ions in emerald

Wei

Guo

Yang

et al. 2011

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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Effects of low magnetic fields in transient spectral hole-burning of the R1-line in emerald, Be3Al2Si6O18:Cr(III)

Cited by 5 publications

References 16 publications

Side-hole to anti-hole conversion in time-resolved spectral hole burning of ruby: Long-lived spectral holes due to ground state level population storage

Side-hole to anti-hole conversion in time-resolved spectral hole burning of ruby: Long-lived spectral holes due to ground state level population storage

Side-hole to anti-hole conversion in time-resolved transient spectral hole-burning of emerald: ground state level versus excited state population storage in low magnetic fields

Studies of the g factors of the ground 4A2 and the first excited 2E state of Cr3+ ions in emerald

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