Muon Spin Rotation Studies of Spin Dynamics at Avoided Level Crossings in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>LiY</mml:mi><mml:mn>0.998</mml:mn></mml:msub><mml:msub><mml:mi>Ho</mml:mi><mml:mn>0.002</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">F</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:math>

Graf, M. J.; Lago, J.; Lascialfari, A.; Amato, A.; Baines, C.; Giblin, Sean; Lord, J. S.; Ткачук, А. М.; Barbara, B.

doi:10.1103/physrevlett.99.267203

Cited by 8 publications

(22 citation statements)

References 11 publications

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“…The broadening induced by increased Ho concentration, and the differences between the N = 1 and 3 resonances, are linked to the size of the ALC tunnel splitting produced by coupling of the low-lying electronuclear levels with the higher singlet states shown in figure 1(a) [9]. At present we have no qualitative explanation for why the N = 1 resonance is more strongly affected by the increase in Ho concentration.…”

Section: Discussionmentioning

confidence: 67%

“…9. As the Ho concentration x is increased, we find that both the overall depolarization rate and the size of the reductions at the resonances are increased (see figure 2).…”

Section: Field-dependent Transverse Depolarization Rate At Low Tempermentioning

confidence: 73%

“…This is contrasted with zero-field and longitudinal field results for samples with x = 0.002 [6] and x = 0.045 [7], respectively, which show a depolarization rate that saturates at low temperature. We also find that the decreases in field-dependent transverse depolarization at ALCs [9] are modified by increasing Ho concentration, and are no longer measurable for x = 0.05.…”

Section: Introductionmentioning

confidence: 73%

“…9, show a pronounced decrease in λ T at magnetic fields of 23 and 69 mT, corresponding to the N = 1 and 3 avoided level crossings, respectively. These reductions result from resonant magnetic fluctuations of the Ho at rates much faster than the muon Larmor frequency, which reduce the quasi-static disorder at the muon site, thereby reducing λ T [9]. The N = 2 resonance has very small ALC splitting (see figure 1), a much lower resonant frequency, and so a very weak reduction is observed at 46 mT.…”

Section: Field-dependent Transverse Depolarization Rate At Low Tempermentioning

confidence: 96%

“…The modest longitudinal fields (B // c-axis // P μ (0), where P μ (0) is the initial muon polarization direction) required to achieve the N = 1 resonance (23 mT) pin the muon spin, rendering the change in the longitudinal field spin-lattice relaxation rate, λ L , too small for studying changes in spin dynamics at ALCs [6]. However, the transverse depolarization rate, λ T , for which the muon precesses about the applied magnetic field, is sensitive to the presence of avoided level crossings, and can be used to study these lower resonances [9].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Onset of magnetic correlations in LiY_1-xHo_xF₄with 0.002 ≤x≤ 0.05 studied via μSR

Graf

Klatsky

Johnson

et al. 2009

J. Phys.: Conf. Ser.

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Section: Discussionmentioning

confidence: 67%

“…9. As the Ho concentration x is increased, we find that both the overall depolarization rate and the size of the reductions at the resonances are increased (see figure 2).…”

Section: Field-dependent Transverse Depolarization Rate At Low Tempermentioning

confidence: 73%

Section: Introductionmentioning

confidence: 73%

Section: Field-dependent Transverse Depolarization Rate At Low Tempermentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Onset of magnetic correlations in LiY_1-xHo_xF₄with 0.002 ≤x≤ 0.05 studied via μSR

Graf

Klatsky

Johnson

et al. 2009

J. Phys.: Conf. Ser.

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Observation of a level crossing in a molecular nanomagnet using implanted muons

Lancaster¹,

Möller²,

Blundell³

et al. 2011

J. Phys.: Condens. Matter

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We have observed an electronic energy level crossing in a molecular nanomagnet (MNM) using muon spin relaxation. This effect, not observed previously despite several muon studies of MNM systems, provides further evidence that the spin relaxation of the implanted muon is sensitive to the dynamics of the electronic spin. Our measurements on a broken ring MNM [H(2)N(t)Bu(is)Pr][Cr(8)CdF(9)(O(2)CC(CH(3))(3))(18)], which contains eight Cr ions, show clear evidence for the S = 0 --> S = 1 transition that takes place at B(c) = 2.3 T. The crossing is observed as a resonance-like dip in the average positron asymmetry and also in the muon spin relaxation rate, which shows a sharp increase in magnitude at the transition and a peak centred within the S = 1 regime.

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The interaction between a positive muon and multiple quadrupolar nuclei

Bentley

Blundell

2023

J. Phys.: Conf. Ser.

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A positively charged muon implanted in copper sits at an octahedral interstitial site and experiences a magnetic dipolar coupling with six nearest-neighbour quadrupolar I = 3/2 copper nuclei. The resulting avoided level crossing resonance observed as a function of magnetic field provides a means of studying these interactions and understanding the effect of the electric-field gradient due to the muon acting on the quadrupolar nuclei. The effect is usually modelled by considering the interaction between the positive muon and a single copper nucleus, but the other five copper nuclei are equally important. By solving the problem in the full 2(2I + 1)6 = 8192-dimensional Hilbert space, we demonstrate the effect of these additional interactions.

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Muon Spin Rotation Studies of Spin Dynamics at Avoided Level Crossings inLiY0.998Ho0.002F4

Cited by 8 publications

References 11 publications

Onset of magnetic correlations in LiY_1-xHo_xF₄with 0.002 ≤x≤ 0.05 studied via μSR

Onset of magnetic correlations in LiY_1-xHo_xF₄with 0.002 ≤x≤ 0.05 studied via μSR

Observation of a level crossing in a molecular nanomagnet using implanted muons

The interaction between a positive muon and multiple quadrupolar nuclei

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Muon Spin Rotation Studies of Spin Dynamics at Avoided Level Crossings inLiY0.998Ho0.002F4

Cited by 8 publications

References 11 publications

Onset of magnetic correlations in LiY1-xHoxF4with 0.002 ≤x≤ 0.05 studied via μSR

Onset of magnetic correlations in LiY1-xHoxF4with 0.002 ≤x≤ 0.05 studied via μSR

Observation of a level crossing in a molecular nanomagnet using implanted muons

The interaction between a positive muon and multiple quadrupolar nuclei

Contact Info

Product

Resources

About

Onset of magnetic correlations in LiY_1-xHo_xF₄with 0.002 ≤x≤ 0.05 studied via μSR

Onset of magnetic correlations in LiY_1-xHo_xF₄with 0.002 ≤x≤ 0.05 studied via μSR