PENGARUH GELOMBANG MIKRO (MICROWAVE ASSISTED) TERHADAP KURVA HISTERISIS DARI BAHAN FERROMAGNETIK CoPd BERBENTUK ELLIPSOID
Until now the data storage device is still constrained unstable because of the super paramagnetic effect. This effect can occur when the value of bit density increases or when the magnetic energy decreases which causes the process of demagnetization due to the magnetization orientation changed in the presence of high temperature. CoPd as one of the ferromagnetic materials has magnetic anisotropy value and large coercivity of the field, so that this material can be patterned with very small size according to the requirement of data storage tool. However, data analysis of the CoPd hysteresis curve is required when the microwave assisted at the CoPd would give to rise of temperature. Therefore, we observe the value of the coercivity of the field on the ellipsoid CoPd material with the dimension of size the diameter varied. In addition external field, the microwave assisted with the value of amplitude is 10000 mT and the value of frequency is 80 GHz give to the sample. Retrieval of data using a micromagnetic simulation program from a public software called Object Oriented Micromagnetic Framework (OOMMF). From the data processing, it is found that coercivity of the field becomes smaller when dimension of sample are getting bigger, This means that the reversal of magnetization of CoPd is getting smaller. With these results it can be concluded that CoPd are suitable for use as data storage devices. The best dimensions are (150x150x450) nm3 and (165x165x495) nm3.
Keywords: CoPd, hysteresis curve, microvawe assisted, coercivity of the field
This work is licensed under a Creative Commons Attribution 4.0 International License.
SPEKTRA: Jurnal Fisika dan Aplikasinya allow the author(s) to hold the copyright without restrictions and allow the author(s) to retain publishing rights without restrictions. SPEKTRA: Jurnal Fisika dan Aplikasinya CC-BY or an equivalent license as the optimal license for the publication, distribution, use, and reuse of scholarly work.
In developing strategy and setting priorities, SPEKTRA: Jurnal Fisika dan Aplikasinya recognize that free access is better than priced access, libre access is better than free access, and libre under CC-BY or the equivalent is better than libre under more restrictive open licenses. We should achieve what we can when we can. We should not delay achieving free in order to achieve libre, and we should not stop with free when we can achieve libre.
SPEKTRA: Jurnal Fisika dan Aplikasinya is licensed under a Creative Commons Attribution 4.0 International License.
You are free to:
Share — copy and redistribute the material in any medium or format
Adapt — remix, transform, and build upon the material for any purpose, even commercially.
The licensor cannot revoke these freedoms as long as you follow the license terms.