Magnetization Reversal and Magnetic Anisotropy in Ordered CoNiP Nanowire Arrays: Effects of Wire Diameter
Ordered CoNiP nanowires with the same
length of 4 mu m and varying diameters (d = 100 nm-600 nm) were fabricated by
electrodeposition of CoNiP onto polycarbonate templates.
X-ray diffraction, scanning electron
microscopy, and high-resolution transmission electron microscopy confirmed the
quality of the fabricated nanowires.
Magnetic measurements and theoretical
analysis revealed that the magnetization reversal and magnetic anisotropy were
significantly influenced by varying of the diameters of the nanowires.
There existed a critical wire
diameter (d(c) approximate to 276 nm), below which the magnetization reversal
occurred via a coherent rotation mode, and above which the magnetization
reversal occurred via a curling rotation mode.
The easy axis of the magnetization
tended to change in direction from parallel to perpendicular with respect to
the wire axis as the wire diameter exceeded d(c) approximate to 276 nm.
With increasing wire diameter, the
coercive field (H-c) and the remanent to saturation magnetization ratio
(M-r/M-s) were also found to rapidly decrease in the range d = 100-400 nm and
gradually decrease for d > 400 nm.
Title:
| Magnetization Reversal and Magnetic Anisotropy in Ordered CoNiP Nanowire Arrays: Effects of Wire Diameter | |
| Authors: | Luu, Van Thiem Le, Tuan Tu Phan, Manh-Huong |
| Keywords: | CoNiP nanowires magnetic properties electrodeposition magnetic sensors |
| Issue Date: | 2015 |
| Publisher: | MDPI AG, POSTFACH, CH-4005 BASEL, SWITZERLAND |
| Citation: | ISIKNOWLEDGE |
| Abstract: | Ordered CoNiP nanowires with the same length of 4 mu m and varying diameters (d = 100 nm-600 nm) were fabricated by electrodeposition of CoNiP onto polycarbonate templates. X-ray diffraction, scanning electron microscopy, and high-resolution transmission electron microscopy confirmed the quality of the fabricated nanowires. Magnetic measurements and theoretical analysis revealed that the magnetization reversal and magnetic anisotropy were significantly influenced by varying of the diameters of the nanowires. There existed a critical wire diameter (d(c) approximate to 276 nm), below which the magnetization reversal occurred via a coherent rotation mode, and above which the magnetization reversal occurred via a curling rotation mode. The easy axis of the magnetization tended to change in direction from parallel to perpendicular with respect to the wire axis as the wire diameter exceeded d(c) approximate to 276 nm. With increasing wire diameter, the coercive field (H-c) and the remanent to saturation magnetization ratio (M-r/M-s) were also found to rapidly decrease in the range d = 100-400 nm and gradually decrease for d > 400 nm. |
| Description: | SENSORS Volume: 15 Issue: 3 Pages: 5687-5696 Published: MAR 2015 ; TNS05742 |
| URI: | http://www.mdpi.com/1424-8220/15/3/5687 http://repository.vnu.edu.vn/handle/VNU_123/31630 |
| ISSN: | 1424-8220 |
| Appears in Collections: | Bài báo của ĐHQGHN trong Web of Science |
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