کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10654238 | 1002951 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Magnetic field influence on the low temperature heat capacity of the spin-Peierls compound CuGeO3
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
We have investigated the effect of magnetic field on the low-temperature heat capacity Cp of the undoped spin-Peierls inorganic compound CuGeO3 in the dimerized phase. Below 1 K, Cp is dominated by a Schottky anomaly, which is removed above 1 K for field B higher than 3 T. This anomaly is well accounted for by a molar concentration x=0.75Ã10â3 of intrinsic defects, which occur predominantly on the Cu chains. This amount is confirmed by magnetization measurements. A second contribution, varying as Tâν with ν=1 or 2, rises up with the field for B>1 T in the lower temperature range (from 70 mK to 0.3 K). At high field this contribution becomes very sensitive to the experimental dynamics.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Communications - Volume 136, Issue 6, November 2005, Pages 360-364
Journal: Solid State Communications - Volume 136, Issue 6, November 2005, Pages 360-364
نویسندگان
J.C. Lasjaunias, S. Sahling, A. Sulpice, A. Revcolevschi, G. Dhalenne,