کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1609885 1516271 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Probable metal–insulator transition in Ag4SSe
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Probable metal–insulator transition in Ag4SSe
چکیده انگلیسی


• New phase transition in Ag4SSe was discovered with scanning calorimetry and supported with X-ray powder diffraction.
• The thermal effect relates to the anomaly in electrical and thermal conductivity of Ag4SSe.
• Similar thermal and electrical effects in K3Cu8S6 are explained with the metal–insulator transition.

New phase transition (285 K) in low-temperature monoclinic Ag4SSe was found out below the α–β transition (358 K) after the measurements with differential scanning calorimetry. The transition reveals significant hysteresis (over 30 K). X-ray powder diffraction shows that the superlattice with doubled a and b parameters of the unit cell exists below the new transition point. The signs of this new phase transition can be found in thermal and electrical conductivity of Ag4SSe published in literature. Elusive phase transition in Ag2Se shows similar properties. The new transition is likely related to the metal–insulator type transition, like K3Cu8S6.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 622, 15 February 2015, Pages 236–242
نویسندگان
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