کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1446212 | 988601 | 2013 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Exploring the magneto-volume anomalies in Dy2Fe17 with unconventional rhombohedral crystal structure
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
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![عکس صفحه اول مقاله: Exploring the magneto-volume anomalies in Dy2Fe17 with unconventional rhombohedral crystal structure Exploring the magneto-volume anomalies in Dy2Fe17 with unconventional rhombohedral crystal structure](/preview/png/1446212.png)
چکیده انگلیسی
We have synthesized the Dy2Fe17 alloy with an unconventional crystal structure (R3¯m space group). Neutron powder thermo-diffraction and X-ray powder diffraction under high pressure (up to 15 GPa) show that the rhombohedral crystal structure is stable. Likewise, the alloy with the usual hexagonal crystal structure (P63/mmc), the rhombohedral variant of Dy2Fe17 compound, exhibits a collinear ferrimagnetic order below the Curie temperature (TC â 363 K), with antiparallel mutual alignment of the Dy and Fe sublattices. Additionally, we have observed two distinctive issues related to magneto-volume anomalies: (i) the pressure dependence of the cell volume at room temperature shows the existence of a critical pressure at which the compound is no longer ferrimagnetic; and (ii) the cell volume shows invar-like behaviour in a wide temperature range (2-290 K), with a minimum at T â 380 K. The spontaneous volume magnetostriction reaches ÏS = 1.6 Ã 10â2 at 2 K that decreases to zero at T â 500 K (â1.4 TC), which is associated with the existence of short-range magnetic correlations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 61, Issue 20, December 2013, Pages 7931-7937
Journal: Acta Materialia - Volume 61, Issue 20, December 2013, Pages 7931-7937
نویسندگان
Pablo Álvarez-Alonso, Pedro Gorria, José L. Sánchez Llamazares, Gabriel J. Cuello, Inés Puente Orench, Jorge Sánchez Marcos, Gastón Garbarino, M. Reiffers, Jesús A. Blanco,