کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1583443 1514892 2007 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermoelectric power and phase transitions in lanthanides under pressure up to 20 GPa
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Thermoelectric power and phase transitions in lanthanides under pressure up to 20 GPa
چکیده انگلیسی

Pressure dependencies of thermopower S of rare-earth metals (Ce and Pr) in a pressure P range of 0–20 GPa and at room temperature are reported. A non-monotonic behaviour of S(P) has been established both at pressure-induced phase transitions: fcc → modified fcc → monoclinic → tetragonal lattice for Ce, and double hexagonal close packed (dhcp) → fcc → modified fcc → monoclinic for Pr. S kept a positive sign for the all high-pressure phases mentioned. Simultaneous measurements of sample contraction have revealed anomalies in the vicinity of the transitions in qualitative agreement with diffraction volumetric data published before. The S(P) dependencies were analysed on the basis of the known results of electronic structure calculation for the Ce and Pr phases. An advantage was demonstrated of the thermopower method in the study of phase transitions and electronic structure of high-pressure phases.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 462, Issues 1–2, 25 July 2007, Pages 427–431
نویسندگان
, , ,