کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1609179 1516258 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Spin-glass-like behaviour in tin doped ZnCr2Se4 single crystals
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Spin-glass-like behaviour in tin doped ZnCr2Se4 single crystals
چکیده انگلیسی


• The new single crystals ZnCr2Se4 doped by tin were successfully synthesized.
• ZFC and FC splitting for all investigated crystals was observed.
• Spin-glass-like behaviour for a large Sn content was discovered.

The single crystals of ZnCr2Se4 doped with tin ions having contents of 0.92, 1.01 and 1.26 located in the octahedral sites of the spinel structure were successfully synthesized. The ac and dc magnetic measurements, and as well as the specific heat studies showed the spin-glass-like behaviour for all compositions below the freezing temperatures Tf = 13–15 K. Both high positive values of the paramagnetic Curie–Weiss temperature, decreasing from 112 K to 58 K as the Sn-content increases, and the lack of a metamagnetic transition (characteristic for the ZnCr2Se4 matrix) suggest a strong ferromagnetic exchange in the (0 0 1) planes which is randomly frozen below Tf between the spins in adjacent (0 0 1) planes. These effects are interpreted in terms of the exchange integral of the spin-glass system including non-stoichiometry, spin and structural defects.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 635, 25 June 2015, Pages 238–244
نویسندگان
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