Paramagnetic Resonance below 1°K: Spin-Lattice Relaxation of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">Ce</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">Nd</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn><mml:mo>+</mml:mo></

Ruby, R.; Benoît, H.; Jeffries, C. D.

doi:10.1103/physrev.127.51

Cited by 82 publications

(14 citation statements)

References 15 publications

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“…Measurements on rare earth ions have confirmed this temperature (54,55) and field (56) dependence. The constants A, B, C are found to be in sub stantial agreement with theoretical estimates; Figure 3 shows the data for Nd3+ in LMN; note the strong exponential temperature dependence of the Orbach process.…”

supporting

confidence: 65%

Dynamic Orientation of Nuclei

Jeffries¹

1964

Annu. Rev. Nucl. Sci.

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supporting

confidence: 65%

Dynamic Orientation of Nuclei

Jeffries¹

1964

Annu. Rev. Nucl. Sci.

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“…If all thermal phonons are frozen out the ultimate limit of spin lifetime is given by the coupling of the spin system to the phononic vacuum modes. The observation of this limit can be obscured by a phonon bottleneck [15][16][17], where excited spins decay and are re-excited if the local phonon excitations are not transferred out of the system sufficiently rapid. A suitable spin system to observe the coupling to phononic vacuum modes is the NV − centre in diamond.…”

mentioning

confidence: 99%

Solid-state electron spin lifetime limited by phononic vacuum modes

et al. 2018

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Longitudinal relaxation is the process by which an excited spin ensemble decays into its thermal equilibrium with the environment. In solid-state spin systems, relaxation into the phonon bath usually dominates over the coupling to the electromagnetic vacuum. In the quantum limit, the spin lifetime is determined by phononic vacuum fluctuations . However, this limit was not observed in previous studies due to thermal phonon contributions or phonon-bottleneck processes. Here we use a dispersive detection scheme based on cavity quantum electrodynamics to observe this quantum limit of spin relaxation of the negatively charged nitrogen vacancy (NV) centre in diamond. Diamond possesses high thermal conductivity even at low temperatures , which eliminates phonon-bottleneck processes. We observe exceptionally long longitudinal relaxation times T of up to 8 h. To understand the fundamental mechanism of spin-phonon coupling in this system we develop a theoretical model and calculate the relaxation time ab initio. The calculations confirm that the low phononic density of states at the NV transition frequency enables the spin polarization to survive over macroscopic timescales.

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“…16 Therefore the following discussion of ⌬Ј = 20.6͑4͒ K in SBN: Ce should prove only the plausibility of our result. Thus we did not perform a detailed theoretical analysis based on crystal field calculations like Ruby et al 17 have done for Ce 3+ in lanthanum magnesium nitrate, Scott and Jeffries 15 for Ce 3+ in ethyl sulfate, or Hellwege et al 18 for the mixed system La 1−x Ce x Cl 3 . In all cases the crystal field (C 3v , C 3h , C 3h -symmetry) splits the 4f 1 2 F 5/2 ground state multiplet into the three doublets at 0 K, 34 K, 200 K, 0 K, 5.7 K, 186 K, and 0 K, 54 K, 158 K, respectively.…”

Section: B Ac-measurementsmentioning

confidence: 99%

Valence-sensitive determination ofCr3+andCe3+
Schaniel
¹
,
Woike
²
,
Weckwerth
³

et al. 2004
Phys. Rev. B
8
0
17
0
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Magnetization-and susceptibility measurements are used as a method to determine the number density of the photorefractive centers Ce 3+ and Cr 3+ in Sr 0.61 Ba 0.39 Nb 2 O 6 (SBN61). The number densities n Ce 3+ = 0.73͑1͒ ·10 20 cm −3 and n Cr 3+ = 1.58͑8͒ ·10 20 cm −3 were determined for crystals doped with 1.6 wt.% Ce and 20000 ppm Cr, respectively. Frequency dependent susceptibility measurements in the temperature range 3-10 K on SBN61: Ce show that the spin-lattice relaxation in this compound is dominated by the Orbach process. The crystal field splitting of the two lowest ground state doublets is determined to 1.77 meV. The susceptibility of SBN61: Cr shows no frequency dependence in the range 10-10 4 Hz.

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Paramagnetic Resonance below 1°K: Spin-Lattice Relaxation ofCe3+andNd3+

Cited by 82 publications

References 15 publications

Dynamic Orientation of Nuclei

Dynamic Orientation of Nuclei

Solid-state electron spin lifetime limited by phononic vacuum modes

Valence-sensitive determination ofCr3+andCe3+
Schaniel
¹
,
Woike
²
,
Weckwerth
³

et al. 2004
Phys. Rev. B
8
0
17
0
View full text Add to dashboard Cite

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Paramagnetic Resonance below 1°K: Spin-Lattice Relaxation ofCe3+andNd3+

Cited by 82 publications

References 15 publications

Dynamic Orientation of Nuclei

Dynamic Orientation of Nuclei

Solid-state electron spin lifetime limited by phononic vacuum modes

Valence-sensitive determination ofCr3+andCe3+Schaniel1, Woike2, Weckwerth3 et al. 2004Phys. Rev. B80170View full textAdd to dashboardCite

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Valence-sensitive determination ofCr3+andCe3+
Schaniel
¹
,
Woike
²
,
Weckwerth
³

et al. 2004
Phys. Rev. B
8
0
17
0
View full text Add to dashboard Cite