THE EFFECT OF COBALT CONTENT ON MAGNETIC PROPERTIES OF CoFe ALLOYS

Authors

  • Widia Nursiyanto Program Studi Teknik Mesin , Universitas Pancasila, Srengseng Sawah, Jagakarsa, Jakarta 12640, Indonesia
  • L. Rohman Jurusan Fisika, FMIPA, Universitas Jember Jln. Kalimantan 37, Jember, Indonesia
  • M. Alfatun N. Jurusan Fisika, FMIPA, Universitas Jember Jln. Kalimantan 37, Jember, Indonesia
  • E. Purwandari Jurusan Fisika, FMIPA, Universitas Jember Jln. Kalimantan 37, Jember, Indonesia

DOI:

https://doi.org/10.21009/SPEKTRA.052.01

Keywords:

CoFe alloy, Currie temperature, hysteresis curve, coercivity field

Abstract

Hard Disk Drive (HDD) as a data storage device when operated with high temperatures (around 66oC), its function will be constrained. The CoFe alloys have a large coercivity field and can be patterned in very small sizes that are suitable for HDD devices. In this study, Co1-x Fex cube alloy was used (x = 0.25; 0.30; 0.50; 0.75). Samples were treated with temperature changes to get the Curie temperature. The coercivity field value is obtained by giving the external field and temperature below Curie temperature and also above Curie temperature to the samples. The VAMPIRE software is a micromagnetic simulation program based on atomistic models. The results showed that Curie’s temperature decreased when Co content increased. The composition of Co0.25 Fe0.75 has the highest Curie temperature that is equal to 1075 K. The temperature Curie is not affected by the size of the cube. When the sample is given a temperature rise below the Curie temperature, the value of the coercivity field decreases.  The value of the coercivity field is very difficult to determine when the temperature used is above the Curie temperature. The percentage of composition does not affect the coercivity field value. Therefore, cube-shaped CoFe material is very suitable for use as a material data storage device operated at temperatures below the Curie.

References

[1] W. N. Santi et al., “Kajian Sifat Kemagnetan pada Nanopartikel Cobalt Ferrite (CoFe2O4) yang dicoating dengan Polyethylene Glykol (PEG-4000) dan Silika,” Jurnal Fisika Indonesia, 2014, vol. 18.
[2] M. Pauzan et al., “Pengaruh ukuran butir dan struktur kristal terhadap sifat kemagnetan pada nanopartikel magnetit (Fe3O4),” Prosiding Pertemuan Ilmiah XXVII HFI Jateng & DIY, 2013.
[3] B. E. Purnama et al., “Rancang Bangun Alat Kontrol Otomatis Pendingin Komputer Berbasis Mikrokontroler ATMEGA8L,” IJNS-Indonesian Journal on Networking and Security, 2013, vol. 2.
[4] T. D. Sugiarto, R. F. Iskandar and I.P. Handayani, “Simulation of Temperature Distribution in Horizontal Fin Heat Sink CPU Processor Using Comsol Multiphysics and Proportional Control,” Journal of Measurements, Electronics, Communications, and Systems, 2015, vol. 1.
[5] N. Aiga, “Simulasi Mikromagnetik Sifat-Sifat Material Co0.8Ni0.2 Random Alloy Berbagai Variasi Ukuran Partikel,” Repository Universitas Jember, 2018.
[6] W. Nursiyanto and L. Rohman, “Analisis Diameter Kritis dan Suhu Curie Bahan Parmalloy FeCoB Berbentuk Bola-Nano serta Pengaruh Temperatur (Heat Assisted) dengan Menggunakan Program Simulasi Mikromagnetik NMAG dan Vampire,” Spektra: Jurnal Fisika dan Aplikasinya, 2017.
[7] M. D. C. Agguire et al., “Co1.00-x Fex magnetic thick films prepared by electrodeposition,” Journal of Alloys and Compounds, 2015.
[8] I. Wahyudi, “Suseptibilitas Magnetik dan Temperatur Curie Material Alloy Feromagnetik Co1-xNix Model Nanotube dan Nanosphere,” Repository Universitas Jember, 2018.
[9] Evans, F.L dan Biternas, A., “Vampire User Manual : Software Version 4.0.,”Heslington: The University of York, 2014. R. F. L. Evans and A. Biternas, “Vampire User Manual: Software Version 4.0,” New York: The University of New York, 2014.
[10] P. Ho et al., “Atomistic Modeling of the Interlayer Coupling Behavior in Perpendicularly Magnetized L10-FePt/Ag/L10-FePt Pseudo Spin Valves,” IEEE transactions on magnetics, 2011.
[11] R. F. L. Evans et al., “Atomistic spin model simulations of magnetic nanomaterials,” J. Phys.: Condens. Matter, 2014, vol. 26.
[12] A. T. Widodo, “Studi Mikromagnetik Dinamika Struktur Domain Pada Material Feromagnetik Py, Ni, Fe Dan Co Model Nanosphere,” Depok: Universitas Indonesia, 2013.

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Published

2020-08-31

How to Cite

Nursiyanto, W., Rohman, L., Alfatun N., M., & Purwandari, E. (2020). THE EFFECT OF COBALT CONTENT ON MAGNETIC PROPERTIES OF CoFe ALLOYS. Spektra: Jurnal Fisika Dan Aplikasinya, 5(2), 87–96. https://doi.org/10.21009/SPEKTRA.052.01

Issue

Vol. 5 No. 2 (2020): SPEKTRA: Jurnal Fisika dan Aplikasinya, Volume 5 Issue 2, August 2020

Section

Articles

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