Nuclear magnetic resonance on oriented rare-earth nuclei in rare-earth hosts: application to<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Tb</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>160</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow></mml:math>

Brewer, W. D.; Román, Pascual; Böttcher, Martin; Illerhaus, Bernhard; Marshak, H.; Freitag, Κ.; Herzog, P.

doi:10.1103/physrevb.38.11019

Cited by 17 publications

(8 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Note that high field magnetisation data for TbNiAl 4 [7] provide a saturated electronic magnetic moment of 8.6 μ B in 30 T, implying B hyp = 298 T in this compound (Tb 3+ free ion value of 311.6 T ≡ 9 μ B ). These derived hyperfine parameters also compare reasonably well with the ( 160 Tb)Tb values of 304.7 T and P/h = 3eV zz Q/4I(2I-1)/h ∼ 180 MHz [4]. The LTNO data of a single crystal TbNiAl 4 sample that was not annealed after neutron activation are shown in Fig.…”

Section: Resultssupporting

confidence: 57%

“…The definitive LTNO study of 160 Tb in neutron irradiated, single crystal elemental Tb by the Berlin group [3] showed unequivocally that no subsequent heat treatment was required post neutron irradiation in order to reproduce within experimental error the more precise NMRON magnetic dipole and electric quadrupole hyperfine interaction parameters obtained on implanted single crystal samples [4]. Our observations show, in striking contrast, complex metal hosts containing 160 Tb represent a far more problematic environment for self annealing of the inevitable radiation damage from high energy prompt gamma emissions following neutron activation.…”

Section: Discussionmentioning

confidence: 95%

“…In particular, rare earth (RE) based amorphous alloys [1] and multi-layer structures have yielded information on preferred directions of the local ionic RE moments under various applied magnetic field strengths, assuming parallelism between electronic magnetic moment, magnetic hyperfine field (MHF), and, in those cases where required, the principal electric field gradient (EFG) [2]. For these latter studies a common approach has been the use of the strongly quadrupolar LTNO probe, 160 Tb, in unannealed samples, post the thermal neutron activation; unannealed, presumably, in part due to the fragility of the samples under study and in part due to the established absence of significant neutron activation damage observed in the extensive Berlin LTNO and NMRON studies on 160 Tb in elemental Tb [3,4]. Our paper highlights a potential fallacy of adopting this sample preparation approach, for complex metal hosts.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Low temperature nuclear orientation observations of severe neutron activation damage in ( 160 Tb)TbNiAl 4

2007

View full text Add to dashboard Cite

An unusually large attenuation (approximately 50%) in the low temperature nuclear orientation directional gamma anisotropy from unannealed thermal neutron irradiated single crystal ( 160 Tb)TbNiAl 4 has been observed in the region of saturation of the second order nuclear orientation coefficient, B 2 . It is suggested that the form of the remanent neutron activation recoil damage in unannealed ( 160 Tb)TbNiAl 4 is fundamentally electric quadrupolar in origin, as opposed to magnetic dipolar.

show abstract

Section: Resultssupporting

confidence: 57%

Section: Discussionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Low temperature nuclear orientation observations of severe neutron activation damage in ( 160 Tb)TbNiAl 4

2007

View full text Add to dashboard Cite

show abstract

“…This value coincides with that of Tb in TbFe 2 (371 T; de Azevedo et al . 1985), but is rather far from that of Tb in bulk Tb (304 · 7 T; Brewer et al . 1988;Sano and Itoh 1972).…”

Section: (4c) Hyperfine Interaction Informationmentioning

confidence: 95%

Nuclear Orientation as a Tool for Investigation of Magnetic Multilayers with Rare Earths

Trhlík¹,

Rotter²,

Severijns³

et al. 1998

Aust. J. Phys.

View full text Add to dashboard Cite

Low-temperature nuclear orientation (NO) is presented as a useful tool to study the behaviour of rare earth (RE) ionic magnetic moments in magnetic multilayers. NO is shown to give rather direct information about the direction of RE ionic moments in such low-dimensional systems. In particular, the perpendicular magnetic anisotropy (PMA) can be directly monitored using RE atoms as probes. The potential of NO is demonstrated by our recent results, which concern the Fe/Tb multilayers. We have studied NO of 160 Tb in Fe(40Å)/Tb(xÅ) (x = 5-30) and found that the Tb magnetic moments show PMA at low external magnetic fields (B ext). PMA of the Tb spins is found to be more pronounced when the Tb layer is thinner. It was found that B ext has a complicated influence on the Tb magnetic moment misalignment, which is connected with an interplay between PMA, the exchange interactions and the shape and magnetic crystalline anisotropy.

show abstract

“…Brewer (Freie Universit~it Berlin) who had used this crystal before in nuclear magnetic resonance experiments [25]. Brewer (Freie Universit~it Berlin) who had used this crystal before in nuclear magnetic resonance experiments [25].…”

Section: Introductionmentioning

confidence: 99%

Precision measurement of theg-factor of the 2+ ?-vibrational state of160Dy and test of theF-spin purity

Alfter

Bodenstedt

Knichel

et al. 1995

Z. Physik A - Hadrons and Nuclei

View full text Add to dashboard Cite

The rotations of the 392-966keV and the 299-966keV directional correlations of 16~ in the static hyperfine field of DyTb have been measured with high precision. A neutron activated Tb single crystal was used which was magnetized to saturation at 4.2 K by an external magnetic field of 4.5 T applied in the direction of the b-axis. The agreement of both rotations proves that the relaxation of the @shell after the fl-decay takes less than 10 ps. A quantum mechanical calculation within the magnon model gave a relaxation time of the order of 1 ps. The g-factor of the 2 § y-vibrational state was derived as g(2 +) = + 0.317 (12) and combining our results with M6ssbauer data [-24] on the magnetic splitting of the 2+t state in the same environment we obtain g(2~)/g + (2rot) --0.s2(3).The results are discussed within the Bohr-Mottelson model and finally within the IBM-2 model in terms of F-spin purity.

show abstract

Nuclear magnetic resonance on oriented rare-earth nuclei in rare-earth hosts: application toTb160

Cited by 17 publications

References 53 publications

Low temperature nuclear orientation observations of severe neutron activation damage in ( 160 Tb)TbNiAl 4

Low temperature nuclear orientation observations of severe neutron activation damage in ( 160 Tb)TbNiAl 4

Nuclear Orientation as a Tool for Investigation of Magnetic Multilayers with Rare Earths

Precision measurement of theg-factor of the 2+ ?-vibrational state of160Dy and test of theF-spin purity

Contact Info

Product

Resources

About