Absorption Spectra of Cr3+ in Al2O3 Part B. Experimental Studies of the Zeeman Effect and Other Properties of the Line Spectra

Sugano, Shigeru; Tsujikawa, Ikuji

doi:10.1143/jpsj.13.899

Cited by 168 publications

(33 citation statements)

References 5 publications

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“…3. RESULTS AND DISCUSSION The splitting patterns to be expected have been given by Tanabe and Sugano [1,2]. Only in the case H0 II C3 do we find a first order Zeeman splitting of the two R lines; g,(2A)_2 and gj,(]~)___-2.…”

Section: Methodssupporting

confidence: 69%

“…Considerable interest has been displayed towards the recording and interpretation of the optical Zeeman effect of the 4Ae-->2E transition found [1][2][3][4][5][6] in the spectra of Cr § dissolved in host lattices of AlzOa, ZnAlzO4 and MgO. Considerably fewer Zeeman measurements have, however, been performed on ' pure' chromium(III) compounds since the pioneering work on chrome alum by Spedding and Nutting [7].…”

Section: Introductionmentioning

confidence: 99%

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The⁴A₂→²Etransitions of 2[Cr(en)₃Cl₃]KCl. 6H₂O in strong magnetic fields

Trabjerg

Ballhausen

1971

Molecular Physics

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Section: Methodssupporting

confidence: 69%

Section: Introductionmentioning

confidence: 99%

The⁴A₂→²Etransitions of 2[Cr(en)₃Cl₃]KCl. 6H₂O in strong magnetic fields

Trabjerg

Ballhausen

1971

Molecular Physics

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“…Many spectroscopic studies have been performed on ruby and sapphire, investigating the states mentioned above and many others. A strong initial motivation, in the 1950s and 1960s, was testing of the then-nascent crystal field theory using the reasonably well-controlled Cr in Al2O3 ruby as the test vehicle [5][6][7][8][9][10][11][12][13]. An additional practical motivation at that time was detailed knowledge of the electro-optical energies of ruby, so that it could be used as a solid-state maser [14] and laser [15] material.…”

Section: Introductionmentioning

confidence: 99%

Review: Coefficients for Stress, Temperature, and Composition Effects in Fluorescence Measurements of Alumina

Cook

Michaels

2017

J. RES. NATL. INST. STAN.

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The numerical coefficients linearly relating the effects of stress (including pressure), temperature, and composition to shifts in the energies of the Cr-related fluorescence in alumina (Al2O3) are reviewed. The primary focus is the shift of the R1 and R2 “ruby” fluorescence lines under conditions typical for stress determination in polycrystalline Al2O3. No significant experimental difference in the R1 and R2 responses is observed for hydrostatic stress (or pressure) conditions (average shift coefficient of about 7.6 cm−1/GPa), changes in temperature (about 0.140 cm−1/K), or variations in composition (about 120 cm−1/mass fraction of Cr). There are significant differences in the R1 and R2 responses for nonhydrostatic stress conditions. In particular, for uniaxial stress along the a and c directions in the Al2O3 crystal, the R1 piezospectroscopic tensor coefficients (about 3.0 cm−1/GPa and 1.6 GPa cm−1/GPa, respectively) differ considerably, whereas the R2 coefficients (about 2.6 cm−1/GPa and 2.3 GPa cm−1/GPa, respectively) do not. Measurements of the piezospectroscopic tensor coefficients are shown to have interlaboratory relative consistency of about 4 % extending over 30 years, and are consistent with the scalar high-pressure measurements. Measurements of the temperature coefficients are shown to have interlaboratory relative consistency less than 1 % extending over 60 years. Fluorescence-based measurements of stress in polycrystalline Al2O3, although requiring temperature adjustment, are shown to have a relative uncertainty of about 2.5 %.

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“…В первом случае больцмановское распределение населенностей в возбужденном состоянии достигается, прежде чем ион успевает излучить 66 .^ Образец /, играющий роль источника излучения, облу-чается световым пучком а от вольфрамовой лампы. Свет флуоресценции б направляется на образец // через поляризатор 2.…”

Section: особенности оптического перекачивания в твердых телахunclassified

Optical orientation of atoms and its applications

Skrotskii¹,

Izyumova²

1961

Usp. Fiz. Nauk

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Явление оптической ориентации атомов или ионов, обладающих магнитными моментами в основном состоянии, может иметь место при селективном поглощении и последующем испускании ими света. При рас-сеянии циркулярно-поляризованного светового кванта резонансной часто-ты отдельным атомом может происходить передача момента импульса фотона этому атому, что приводит к изменению составляющей магнитного момента атома на направление распространения света, т. е. к его ориентации. Другими словами, облучение ансамбля атомов светом резонансной частоты приводит к изменению населенностей энергетических подуровней основ-ного состояния атомов. Этот процесс получил название оптического пере-качивания (pompage optique) г . Явление может наблюдаться как на зеемановских подуровнях атомов, находящихся во внешнем магнитном поле, так и в отсутствие этого поля. Возникающее при непрерывном освещении стационарное распределение населенностей подуровней при некоторых условиях может оказаться существенно отличным от термически равновесного.В результате процесса оптического перекачивания можно достигнуть такого распределения населенностей между подуровнями, что суммарный магнитный момент системы атомов будет либо равен нулю (выравнивание), либо отличен от нуля (ориентация).Любое изменение населенностей сверхтонких, зеемаловских или штар-ковских подуровней, произведенное оптически или с помощью радиочасхот-4*

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Absorption Spectra of Cr³⁺ in Al₂O₃ Part B. Experimental Studies of the Zeeman Effect and Other Properties of the Line Spectra

Cited by 168 publications

References 5 publications

The⁴A₂→²Etransitions of 2[Cr(en)₃Cl₃]KCl. 6H₂O in strong magnetic fields

The⁴A₂→²Etransitions of 2[Cr(en)₃Cl₃]KCl. 6H₂O in strong magnetic fields

Review: Coefficients for Stress, Temperature, and Composition Effects in Fluorescence Measurements of Alumina

Optical orientation of atoms and its applications

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Absorption Spectra of Cr3+ in Al2O3 Part B. Experimental Studies of the Zeeman Effect and Other Properties of the Line Spectra

Cited by 168 publications

References 5 publications

The4A2→2Etransitions of 2[Cr(en)3Cl3]KCl. 6H2O in strong magnetic fields

The4A2→2Etransitions of 2[Cr(en)3Cl3]KCl. 6H2O in strong magnetic fields

Review: Coefficients for Stress, Temperature, and Composition Effects in Fluorescence Measurements of Alumina

Optical orientation of atoms and its applications

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Product

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Absorption Spectra of Cr³⁺ in Al₂O₃ Part B. Experimental Studies of the Zeeman Effect and Other Properties of the Line Spectra

The⁴A₂→²Etransitions of 2[Cr(en)₃Cl₃]KCl. 6H₂O in strong magnetic fields

The⁴A₂→²Etransitions of 2[Cr(en)₃Cl₃]KCl. 6H₂O in strong magnetic fields