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The phase diagram of (NH4I)x(KI)1−x |
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| Authors: | M Paasch M Winterlich R Böhmer R Sonntag G J McIntyre A Loidl |
| Institution: | 1. Institut für Festk?rperphysik, Technische Hochschule Darmstadt, D-64289, Darmstadt, Germany 2. Institut für Physikalische Chemie, Universit?t Mainz, D-55099, Mainz, Germany 3. BENSC, Hahn-Meitner Institut, D-14109, Berlin, Germany 4. Institut für Kristallographie, Universtit?t Tübingen, D-72070, Tübingen, Germany 5. Institut Laue-Langevin, F-38042, Grenoble, France |
| Abstract: | The χ,T phase diagram of (NH4I)x(KI)1?x has been determined using neutron diffraction experiments and dielectric spectroscopy. At low temperatures and with decreasing χ, the sequence γ, β, ε and glass phase has been detected. The critical concentration χc≈0.55 separates the glassy phase with frozen-in orientational disorder from the ε phase which reveals long-range orientational order. Close to χc our experiments reveal evidence for two subsequent glass transitions. |
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