کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1620331 1005733 2010 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis of fine particles of a geometrically frustrated spin-chain system Ca3Co2O6 through a pyrophoric route and its magnetic behavior
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Synthesis of fine particles of a geometrically frustrated spin-chain system Ca3Co2O6 through a pyrophoric route and its magnetic behavior
چکیده انگلیسی

We report the synthesis of fine particles of a well-known geometrically frustrated spin-chain compound Ca3Co2O6 through a new route, namely, a pyrophoric method employing triethanolamine (TEA) and studied the magnetic behavior of such specimens. We find that this method of synthesis yields particles made up of rods whose diameter appears to be controllable by the fraction of TEA during synthesis. It is seen that the two well-known magnetic transitions (∼24 K and ∼8 K) remains unaffected for all TEA concentrations used. The most notable finding is that the multi-step feature in the M versus magnetic-field isotherm reported for the single crystalline form tends to smoothen out gradually with decreasing rod thickness (from about 1 μm to a few hundred nm). Further, unlike for the single crystalline form known in the literature, there is no tendency for the relaxation time (τ) to remain constant at low temperatures (<10 K) and τ remains temperature dependent up to the lowest temperature measured (1.8 K) in all the specimens. These findings suggest that the multi-step magnetization anomaly in this system may be characterized by a magnetic correlation length.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 498, Issue 1, 21 May 2010, Pages 1–4
نویسندگان
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