EN
Magnetic phase transitions due to compositional variation across amorphous thin–films
Abstract
The structural and magnetic properties of amorphous thin–films with various CoFeTaB thicknesses were studied to observe magnetic phase transitions due to compositional variation through the CoFeTaB layer. The investigations of the structural properties of amorphous CoFeTaB thin–films were undertaken to confirm layer thickness, interface roughness, and their amorphous structure. Temperature dependent magnetic characterizations were performed to extract Curie temperatures of each thin–film structure, where there is evidence of more than one magnetic transition point. These transition points indicate magnetic phase transitions, which may be attributed to compositional variations across the amorphous CoFeTaB thin–films. Investigation of diffusion process in ferromagnetic thin–films is crucial for the development of spintronic applications.
Keywords
References
- [1] Cooper E. I., Bonhote C., Heidmann J., Hsu Y., Kern P., Lam J. W., Ramasubramanian M., Robertson N., Romankiw L. T., Xu H., Recent developments in high-moment electroplated materials for recording heads, IBM Journal of Research and Development, 49 (1) (2005) 103-126.
- [2] Chen A. P., Burton J. D., Tsymbal E. Y., Feng Y. P., Chen J., Effects of B and C doping on tunneling magnetoresistance in CoFe/MgO magnetic tunnel junctions, Physical Review B, 98 (4) (2018) 045129.
- [3] Parkin S. S., Kaiser C., Panchula A., Rice P. M., Hughes B., Samant M., Yang S. H., Giant tunnelling magnetoresistance at room temperature with MgO (100) tunnel barriers, Nature Materials, 3 (12) (2004) 862-867.
- [4] Platt C. L., Minor N. K., Klemmer T. J., Magnetic and structural properties of FeCoB thin films, IEEE Transactions on Magnetics, 37 (4) (2001) 2302-2304.
- [5] Djayaprawira D. D., Tsunekawa K., Nagai M., Maehara H., Yamagata S., Watanabe N., Yuasa S., Suzuki Y., Ando K., 230% room-temperature magnetoresistance in CoFeB∕MgO∕CoFeB magnetic tunnel junctions, Applied Physics Letters, 86 (9) (2005) 092502.
- [6] Ikeda S., Miura K., Yamamoto H., Mizunuma K., Gan H. D., Endo M., Kanai S., Hayakawa J., Matsukara F., Ohno H., A perpendicular-anisotropy CoFeB–MgO magnetic tunnel junction, Nature Materials, 9 (9) (2010) 721-724.
- [7] Kubota H., Fukushima A., Yakushiji K., Nagahama T., Yuasa S., Ando K., Maehara H., Nagamine Y., Tsunekawa K., Djayaprawira D. D., Watanabe N., Suzuki Y., Quantitative measurement of voltage dependence of spin-transfer torque in MgO-based magnetic tunnel junctions, Nature Physics, 4 (1) (2008) 37-41.
- [8] Fukamichi K., Gambino R. J., The Curie temperature and magnetization of Fe-base amorphous binary alloys containing transition metal, IEEE Transactions on Magnetics, 17 (6) (1981) 3059-3061.
Details
Primary Language
English
Subjects
Classical Physics (Other)
Journal Section
Research Article
Authors
Mustafa Tokaç
*
0000-0001-5614-2292
Türkiye
Publication Date
September 24, 2021
Submission Date
May 19, 2021
Acceptance Date
July 3, 2021
Published in Issue
Year 1970 Volume: 42 Number: 3