Electron-spin-lattice relaxation in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">Yb</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>-doped silicate glass

Stevens, Sally B.; Stapleton, H. J.

doi:10.1103/physrevb.42.9794

Cited by 20 publications

(18 citation statements)

References 38 publications

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“…Thus, at low temperatures (below about 8 K) the relaxation rate exhibits T 2 dependence, which changes to linear temperature dependence as the temperature increases and to an exponential-type relaxation at higher temperatures (above 40 K). A similar temperature behavior is expected in doped or irradiated crystals with strongly inhomogeneous distribution of paramagnetic centers or when the doping level is larger than 1% (9,15).…”

Section: Theoretical Temperature Dependence Of the Relaxation Rate Insupporting

confidence: 57%

“…[2] for a comparison) and the last term describes the relaxation of the pairs (9,14,37). Since 1/sin h(x) = cosech(x) the first two contributions exhibit similar temperature dependence but for the TLS mechanism the frequency dependence is characteristic.…”

Section: Theoretical Temperature Dependence Of the Relaxation Rate Inmentioning

confidence: 98%

“…In such a case, theoretical calculations of the relaxation rate assume the Debye model of lattice vibrations with a density of phonon states ρ(ω) ∝ ω 2 , although it is well known that this model is far from the real phonon spectra of even simple crystals. Some modifications have been proposed with ρ(ω) ∝ ω p ( p < 2) (7,8) or by making the Debye cutoff frequency less abrupt (9). For a description of the temperature dependence of 1/T 1 for the Raman processes the transport integrals over a Debye phonon spectrum must be calculated numerically (10).…”

Section: Introductionmentioning

confidence: 99%

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Electron Spin Relaxation in Pseudo-Jahn–Teller Low-Symmetry Cu(II) Complexes in Diaqua(L-Aspartate)Zn(II)·H2O Crystals

Hoffmann

Hilczer

Goslar

et al. 2001

Journal of Magnetic Resonance

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Section: Theoretical Temperature Dependence Of the Relaxation Rate Insupporting

confidence: 57%

Section: Theoretical Temperature Dependence Of the Relaxation Rate Inmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Electron Spin Relaxation in Pseudo-Jahn–Teller Low-Symmetry Cu(II) Complexes in Diaqua(L-Aspartate)Zn(II)·H2O Crystals

Hoffmann

Hilczer

Goslar

et al. 2001

Journal of Magnetic Resonance

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“…Subsequent work from the same lab found metalloprotein relaxation that did not fit the fractal model (Stevens and Stapleton, 1990). Subsequently, many labs have tried to fit relaxation data to a fractal model (Schultz et ai.…”

Section: Fractal Relaxationmentioning

confidence: 97%

Relaxation Times of Organic Radicals and Transition Metal Ions

Eaton

2002

Biological Magnetic Resonance

155

165

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Abstract:Review of electron spin relaxation times for organic radicals and transition metal ions in magnetically dilute samples. Emphasis is placed on studies that have been performed as a function of temperature and that provide insight into the relaxation processes. INTRODUCTION Scope of this ChapterMost of the methods for determining distances between spins (ch.l) are either experimentally feasible or theoretically applicable for a limited range of electron spin relaxation times. For example, analysis of the dipolar contribution to the CW line shape to determine interspin distance requires that the relaxation rate for the interacting partner is slow enough that the dipolar splitting is not collapsed by electron spin relaxation. In addition, analysis of the line shapes assumes that spectra are obtained under nonsaturating conditions and are free from passage effects. Application of methods based on changes in relaxation times requires that the relaxation rate of the interacting partner fall within certain limits. The longest distance that can be obtained by pulsed techniques is limited, in principle, by the relaxation-determined width of an individual spin packet. Thus, knowledge of electron spin relaxation times is foundational to the methodologies presented in this book.

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“…Finally, the temperature dependence of SLR in Yb3 § glass samples was reported by Antipin etal. [8], and by Stevens and Stapleton [9] at very low temperatures. The lack of information on SLR in amorphous systems is due to the frequently-encountered difficulty in measuring rapid relaxation times.…”

Section: Introductionmentioning

confidence: 99%

Temperature and concentration dependences of the spin-lattice relaxation rate in four borate glasses doped with Fe2O3

et al. 1996

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Spin-lattice relaxation time (/'1) of Fe 3+ ions has been measured in four borate glasses doped with 0.25, 0.5, 1 and 3 wt.% Fe203 by the modulation method over the temperature range 5-250 K. In the three less concentrated samples, ir was observed that T; -I oc T at intermediate temperatures. This is explained in terms of a relaxation mechanism involving TLS (Two Level Systems). At higher temperatures, the temperature dependence of Ti ~ is slowed down by cross-relaxation. In the most concentrated sample, the exchange interaction plays a dominant tole leading to a very different relaxation-time behaviour, described well by the Bloembergen and Wang three-reservoir model.

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Electron-spin-lattice relaxation inYb3+-doped silicate glass

Cited by 20 publications

References 38 publications

Electron Spin Relaxation in Pseudo-Jahn–Teller Low-Symmetry Cu(II) Complexes in Diaqua(L-Aspartate)Zn(II)·H2O Crystals

Electron Spin Relaxation in Pseudo-Jahn–Teller Low-Symmetry Cu(II) Complexes in Diaqua(L-Aspartate)Zn(II)·H2O Crystals

Relaxation Times of Organic Radicals and Transition Metal Ions

Temperature and concentration dependences of the spin-lattice relaxation rate in four borate glasses doped with Fe2O3

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