Zobrazeno 1 - 10
of 41
pro vyhledávání: '"K. K. Nummila"'
Publikováno v:
Journal of Materials Science. 36:839-844
We present a systematic investigation of conditions for heat treatment of Rh with the aim of increasing the residual resistivity ratio (RRR). The maximal value of RRR for a 25 μm thick foil was found to be 1050 and the optimal treatment conditions w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b02778ca7d049ed414df7fd77ed9fd6a
https://doi.org/10.1023/a:1004874412227
https://doi.org/10.1023/a:1004874412227
Publikováno v:
Journal of Low Temperature Physics. 123:65-102
We performed SQUID-NMR measurements on a rhodium single crystal at ultra-low nuclear-spin temperatures. With initial polarizations up to p=0.95, the antiferromagnetic tendency was clear, but surprisingly no indication of actual nuclear magnetic order
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1b43fd9aeda9d7de62759815444555af
https://doi.org/10.1023/a:1017545531677
https://doi.org/10.1023/a:1017545531677
Publikováno v:
Journal of Low Temperature Physics. 120:121-150
A new cascade nuclear demagnetization cryostat has been designed and constructed. Our aim was to build a versatile, modular cryostat, with a large experimental space providing an excellent platform for various types of ultralow temperature measuremen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d300311ae71e6dca218cf99ac28b6d66
https://doi.org/10.1023/a:1004665020659
https://doi.org/10.1023/a:1004665020659
Publikováno v:
Physica E: Low-dimensional Systems and Nanostructures. 3:224-228
We investigate electron thermalization of tunnel junction arrays installed in a powerful dilution refrigerator whose mixing chamber can produce lattice temperatures down to 3 mK. The on-chip Coulomb blockade thermometers (CBT) against other thermomet
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2d462e3d4c9bb4da46fb51c2f2979819
https://doi.org/10.1016/s1386-9477(98)00207-0
https://doi.org/10.1016/s1386-9477(98)00207-0
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
Publikováno v:
Zeitschrift für Physik B Condensed Matter. 102:439-447
We have utilized both neutron transmission and neutron diffraction to measure the spin polarization in a single crystal of 109Ag, whereby the nuclear spin temperature could be obtained. Transmission of a polarized neutron beam provides an accurate an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a6bad95ec0d982f7ab6fba2737df00f8
https://doi.org/10.1007/s002570050309
https://doi.org/10.1007/s002570050309
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. K. Nummila
Publikováno v:
Czechoslovak Journal of Physics. 46:3271-3278
We have extended the range of neutron diffraction techniques down to picokelvin temperatures in our experiments on spontaneous long range nuclear order of spin-1/2 nuclei in a single crystal of109Ag [1]. The observed antiferromagnetic phase had a sim
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3f108e7cf1d840442345408bf0bc50e5
https://doi.org/10.1007/bf02548140
https://doi.org/10.1007/bf02548140
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