Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8152639 | Journal of Magnetism and Magnetic Materials | 2018 | 21 Pages |
Abstract
The following structures are deposited under the conditions stated: (a) glass/Ru (X nm)/Co60Fe20V20(5â¯nm) and (b) glass/Ta(Yâ¯nm)/Co60Fe20V20(5â¯nm) at room temperature (RT), where each of X and Y is from 5â¯nm to 10â¯nm. The hysteresis loop of glass/Ru (X nm)/Co60Fe20V20(5â¯nm) and glass/Ta(Yâ¯nm)/Co60Fe20V20(5â¯nm) presents in-plane easy-axis magnetic anisotropy. The saturation magnetization (Ms) of glass/Ru(X nm)/Co60Fe20V20(5â¯nm) is decreased from 1490â¯emu/cm3 to 1050â¯emu/cm3 when the Ru thickness is increased. The maximum Ms of glass/Ru(5â¯nm)/Co60Fe20V20(5â¯nm) is about 1490â¯emu/cm3. The Ms of glass/Ta(Yâ¯nm)/Co60Fe20V20(5â¯nm) displays a concave-up feature. The maximum Ms of glass/Ta(10â¯nm)/Co60Fe20V20(5â¯nm) is about 1300â¯emu/cm3. The Ms varies with the Ru and Ta seed layer thicknesses due to various distances of spin-coupling interaction. In addition, the Hc values have very small ranges from about 1.2 Oe to 3.4 Oe in glass/Ru(X nm)/Co60Fe20V20(5â¯nm) and 1.0 Oe to 2.6 Oe in glass/Ta(Yâ¯nm)/Co60Fe20V20(5â¯nm), suggesting that the magnetic characteristic is soft magnetism owing to a low Hc and high Ms. The transmittance percentage (%) of glass/Ru(X nm)/Co60Fe20V20(5â¯nm) and glass/Ta(Yâ¯nm)/Co60Fe20V20(5â¯nm) is decreased from 16.5% to 7% and decreased from 16% to 12%, respectively, as the Ru and Ta thicknesses change from 5â¯nm to 10â¯nm, because a greater thickness and interface effect can inhibit the transfer of photon signals through the film, causing low transmittance. According to magnetic and optical performance, the optimal seed layer thicknesses of glass/Ru(X nm)/Co60Fe20V20(5â¯nm) and glass/Ta(Yâ¯nm)/Co60Fe20V20(5â¯nm) are 5â¯nm and 10â¯nm, which are suitable for magnetic-optical recording medium applications.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Yuan-Tsung Chen, Yung-Huang Chang, Wen-Jen Liu, Wei-Chiao Liang, Wei-Hsiang Chan, Yu-Tang Wang, Te-Ho Wu,