Zobrazeno 1 - 10
of 18
pro vyhledávání: '"R. T. Vuorinen"'
Publikováno v:
Journal of Low Temperature Physics. 112:73-116
Nuclear antiferromagnetism in fcc silver metal, already investigated by NMR measurements, has been studied in a single crystal of109Ag by neutron absorption and diffraction techniques. Below the Neel temperature TN, a (001) Bragg reflection with a re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f501e2f76bbef906ca3c85b337b9acc6
https://doi.org/10.1023/a:1022293912218
https://doi.org/10.1023/a:1022293912218
Autor:
Kurt Nørgaard Clausen, K. Lefmann, Juha Tuoriniemi, A. Metz, Olli V. Lounasmaa, F. B. Rasmussen, M. Steiner, R. T. Vuorinen, K. K. Nummila, K. Siemensmeyer
Publikováno v:
Physica B: Condensed Matter. :506-510
Nuclear magnetic order in copper and silver has been investigated by neutron diffraction. Antiferromagnetic order is observed in these simple, diamagnetic metals at temperatures below 50 nK and 560 pK, respectively. Both crystallize in the FCC-symmet
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::59301272d4e359f9a5d456cf8c14141f
https://doi.org/10.1016/s0921-4526(97)00630-3
https://doi.org/10.1016/s0921-4526(97)00630-3
Publikováno v:
Zeitschrift für Physik B Condensed Matter. 102:433-438
We have studied spin-lattice relaxation in silver metal at temperatures and magnetic fields beyond the validity of the normal Korringa relation τ1 = κ/Tc using transmission of polarized and unpolarized neutrons. For the Korringa constant of 109Ag w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::10a1aa1d5b566ef4eaf0a25faaefd2ca
https://doi.org/10.1007/s002570050308
https://doi.org/10.1007/s002570050308
Autor:
K. Siemensmeyer, Kurt Nørgaard Clausen, K. K. Nummila, Juha Tuoriniemi, M. Steiner, R. T. Vuorinen, A. Metz, K. Lefmann, F. B. Rasmussen, Olli V. Lounasmaa
Publikováno v:
University of Copenhagen
Spontaneous long-range nuclear antiferromagnetic order in the spin-\textonehalf{} system of silver nuclei was observed by neutron diffraction on a single crystal of $^{109}\mathrm{Ag}$. A structure with the ordering vector $k=(\frac{2\ensuremath{\pi}
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8fae0ef929e0328676bab4825550cf89
https://doi.org/10.1103/physrevlett.75.3744
https://doi.org/10.1103/physrevlett.75.3744
Publikováno v:
Journal of Low Temperature Physics. 98:449-487
We have measured the susceptibility of polycrystalline rhodium foils, down to nuclear spin temperaturesT = 280 pK and “up” toT = −750 pK. AtT > 0, the static susceptibility follows the antiferromagnetic Curie-Weiss law with θ = −1.8±0.3 nK.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9a5aad5583abf63f8e6356fa5c13dc5a
https://doi.org/10.1007/bf00752278
https://doi.org/10.1007/bf00752278
Autor:
Pertti Hakonen, R. T. Vuorinen
Publikováno v:
Journal of Magnetism and Magnetic Materials. :17-20
In silver, Ruderman-Kittel exchange interaction leads to nuclear antiferromagnetic ordering at 0
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0f982bcbb8c57b5fde1369a4456e6860
https://doi.org/10.1016/0304-8853(94)00592-3
https://doi.org/10.1016/0304-8853(94)00592-3
Publikováno v:
Physical Review Letters. 70:2818-2821
We have measured the dynamic susceptibility of polycrystalline rhodium foils down to 280 pK and up to -750 pK. These record-low and -high nuclear spin temperatures were reached by adiabatic demagnetization using initial polarizations of 83 and -60%.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0c70257e2c7258fb49506397c9410106
https://doi.org/10.1103/physrevlett.70.2818
https://doi.org/10.1103/physrevlett.70.2818
Autor:
R. T. Vuorinen, Pertti Hakonen
Publikováno v:
Journal of Low Temperature Physics. 89:177-186
Nuclear ferromagnetic ordering in silver, caused by the antiferromagnetic Ruderman-Kittel interactions, has been observed at negative absolute temperatures T>−1.9 nK. The ordered states, reached by adiabatic demagnetization after population inversi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dc54c3d6f1814d5b07694f86f5ab4e61
https://doi.org/10.1007/bf00692590
https://doi.org/10.1007/bf00692590
Publikováno v:
Physical Review B. 45:2196-2200
We have studied the spin dynamics of highly polarized silver nuclei at negative absolute temperatures up to inverted polarizations p≃-70%. The measured NMR spectra at B=0.4 and 0.8 mT display a clear inverted suppression-enhancement effect, arising
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::460e9edbbe07a87713276d9cf4ae4f9a
https://doi.org/10.1103/physrevb.45.2196
https://doi.org/10.1103/physrevb.45.2196
Publikováno v:
Physical Review Letters. 68:365-368
The ferromagnetically ordered state in the nuclear spin system of silver has been reached at negative absolute temperatures by adiabatic nuclear demagnetization at entropies below 0.82 ln2. The ordering, caused by the antiferromagnetic Ruderman-Kitte
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::89a5c352d2f5b7da3d5f1dce94e52de5
https://doi.org/10.1103/physrevlett.68.365
https://doi.org/10.1103/physrevlett.68.365