Magnetic hyperfine interaction in erbium ethysulphate

Seidel, Eberhard; Kaindl, G.; Clauser, M.J.; Mößbauer, R. L.

doi:10.1016/0375-9601(67)90679-2

Cited by 17 publications

(4 citation statements)

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“…Hence, as shown in Fig. 4(b), the MR of the non-quenched film exhibits the normal behavior as those observed in other systems [15].…”

supporting

confidence: 60%

“…R 02 decreases with the magnetic field and gradually tends to saturate for B ! 15; 000 G; which is quite different from those of other systems [15]. This phenomenon is observed in all samples in the resistance range of 100 , 1000V and it is nearly unchanged by temperature ð2 , 300 KÞ: Furthermore there is no obvious difference between the results measured when the magnetic field increases or decreases.…”

contrasting

confidence: 45%

“…For higher magnetic field, the displacement of the domain wall or the rotation of the magnetic domain increases. Both these two processes would reduce the electron scattering and therefore the sheet resistance [15]. The higher the magnetic field is, the more the amount of the resistance will be reduced.…”

mentioning

confidence: 98%

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Anomalous electrical transport properties of a quenched iron film system

Tao

Feng

Cai

et al. 2004

Solid State Communications

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“…Hence, as shown in Fig. 4(b), the MR of the non-quenched film exhibits the normal behavior as those observed in other systems [15].…”

supporting

confidence: 60%

contrasting

confidence: 45%

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Anomalous electrical transport properties of a quenched iron film system

Tao

Feng

Cai

et al. 2004

Solid State Communications

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“…Paramagnetic relaxation has also been previously resolved in Mössbauer studies of other rareearth ions such as Er 3+ or Yb 3+ in dilute systems, but only at very low temperatures. [19][20][21][22][23] These ions exhibit fast spin-lattice relaxation at higher temperatures due to their orbital angular momentum L. By contrast Eu 2+ is in a S state with L=0, hence the relaxation is determined by the spin-spin interaction. 24 2.…”

Section: Resultsmentioning

confidence: 99%

Paramagnetic hyperfine splitting in theE151uMössbauer spectra ofCaF2:
Selling
¹
,
Bielemeier²,
Wortmann³
et al. 2008
Phys. Rev. B
3
0
2
0
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Abstract151 Eu Mössbauer spectra in zero magnetic field of highly dilute (0.1 mol%) Eu 2+ ions in CaF 2 showed an almost temperature-independent asymmetrically split pattern, arising from the paramagnetic hyperfine interaction AS. I in a cubic crystal field with slow electron spin relaxation; in a small external magnetic field B of 0.2 T such that gμ B B>A an almost symmetrical pattern was observed. Both the spectra with and without external field are well described using the spin Hamiltonian and previous electron paramagnetic resonance data. A more concentrated (2 mol% Eu 2+ ) sample exhibited a strongly broadened symmetrical resonance line due to an increased Eu-Eu spin relaxation rate; in an external magnetic field of 0.2 T the Mössbauer spectra exhibited further broadening and additional magnetic structures due to the reduced relaxation rate. When a large field of 6 T was NIH-PA Author ManuscriptNIH-PA Author Manuscript NIH-PA Author Manuscript applied such that gμ B B is much larger than the crystal field splitting, a fully resolved hyperfine pattern was observed at 2.5 K, with an effective field at the Eu nuclei of −33.7 T; at higher temperatures superimposed patterns originating from excited electronic states were observed in the spectra. The present results on the highly dilute CaF 2 : 0.1%Eu 2+ sample deliver a straightforward explanation for previous observations of a seemingly large dependence of the Eu 2+ isomer shift on europium concentration.

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