کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1606834 | 1516228 | 2016 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structural and magnetic properties of hydrothermally synthesized β-MnO2 and α-KxMnO2 nanorods
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
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چکیده انگلیسی
Hydrothermal synthesis was applied for obtaining different manganese dioxide polymorphs whose morphology, structure and magnetic properties were thoroughly investigated. Variations in the synthesis pathways lead to the formation of tetragonal rutile-type β-MnO2 and two tetragonal hollandite-type α-KxMnO2 samples with different concentration of potassium cations (x = 0.15 and 0.18). SEM images showed nanorod shape of all specimens, while microstructure characterization done by XRD measurements revealed that crystallites have an elongated rod-like shape and, hence, it confirmed the anisotropic morphology. Magnetic ordering of β-MnO2 is antiferromagnetic below 93 K, while both α-KxMnO2 samples possess more complicated low-temperature behaviour of the reentrant spin-glass type: the onset of the spin-glass like state occurs at temperatures below the weak ferromagnetic ordering.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 665, 25 April 2016, Pages 261-270
Journal: Journal of Alloys and Compounds - Volume 665, 25 April 2016, Pages 261-270
نویسندگان
Tanja Barudžija, Vladan Kusigerski, Nikola CvjetiÄanin, SaÅ¡a Å orgiÄ, Marija PeroviÄ, Miodrag MitriÄ,