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Neutron thermometry applied to magnetization and spin-lattice relaxation measurements on silver nuclei |
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| Authors: | J T Tuoriniemi K K Nummila K Lefmann R T Vuorinen A Metz |
| Institution: | 1. Low Temperature Laboratory, Helsinki University of Technology, FIN-02150, Espoo, Finland 2. Department of Solid State Physics, Risó National Laboratory, DK-4000, Roskilde, Denmark 3. Hahn-Meitner-Institut, D-14109, Berlin, Germany |
| Abstract: | We have studied spin-lattice relaxation in silver metal at temperatures and magnetic fields beyond the validity of the normal Korringa relation τ 1 = κ/T c using transmission of polarized and unpolarized neutrons. For the Korringa constant of 109Ag we obtained κ = (10.0± 0.3) sK. Unpolarized neutrons were also used to measure the critical value of entropy S for nuclear antiferromagnetic ordering and to determine the induced magnetization M in the ordered state. The nuclear susceptibility X = μ 0 M/B = 0.36 ± 0.01 was found to be constant, independent of S and B (B c ≈ 100 μT). |
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