Coercivity in Annealed Fe57Pt43 Thin Films
Main Article Content
Abstract
Fe57Pt43 thin films have been prepared by RF sputtering. As-deposited films were formed in a disordered face-centered cubic (fcc) phase. Upon annealing, the films transformed into the ordered face-centered tetragonal (fct) L10 phase. The effect of annealing temperature on magnetic properties of the films has been studied. The magnetic coercivity was governed by the degree of atomic order of the ordered phase in Fe57Pt43 film.
Keywords:
L10 structure, coercivity, FePt
References
[1] D. Weller, A. Moser, L. Folks, M. E. Best, W. Lee, M. F. Toney, M. Schwikert, J. U. Thiele, M. F. Doerner, High Ku Materials Approach to 100 Gbits/in2, IEEE Trans. Magn. 36, No. 1, 2000, pp. 10-15.
[2] D. Weller, O. Mosendz, G. Parker, S. Pisana, T. S. Santos, L10 FePtX-Y Media for Heat-Assisted Magnetic Recording, Phys. Status Solidi A, Vol. 210, Iss. 7, 2013, pp. 1245-1260.
[3] Y. Hong, I. de Moraes, G. G. Eslava, S. Grenier, E. B. Amalric, A. Dias, M. Bonfim, L. Ranno, T. Devillers, N. M. Dempsey, A High Throughput Study of Both Compositionally Graded and Homogeneous Fe-Pt thin Films, J. Mater. Res. Technol., Vol. 18, 2022, pp. 1245-1255.
[4] G. H. O. Daalderop, P. J. Kelly, M. F. H. Schuurmans, Magnetocrystalline Anisotropy and Orbital Moments in Transition-metal Compounds, Phys. Rev. B, Vol. 44, No. 21, 1991, pp. 12054-12057.
[5] T. Mahalingam, J. P. Chu, J. H. Chen, S. F. Wang, K. Inoue, Microstructure and Magnetic Properties of Sputtered Fe-Pt Thin Films, J. Phys: Condensed. Matter., Vol. 15, No. 17, 2003, pp. 2561-2571.
[6] A. C. Sun, S. C. Chen, P. C. Kuo, C. Y. Chou, Y. H. Fang, J. H. Hsu, H. L. Huang, H. W. Chang, Reduction of Grain Size and Ordering Temperature in L10 FePt Thin Films, IEEE Trans. Magn., Vol. 41, No. 10, 2005,
pp. 3772-3774.
[7] D. W. Chun, S. M. Kim, G. H. Kim, W. Y. Jeung, Improvement of Magnetic Properties and Texture of FePt Thin Films on MgO Substrate by Sn Addition, J. Magnetics, Vol. 14, No. 1, 2009, pp. 7-10.
[8] N. T. T. Van, N. H. Hai, N. H. Luong, V. V. Hiep, N. Chau, Magnetic Properties of (FePt)100-xCux Thin Films, J. Korean Phys. Soc., Vol. 52, No. 5, 2008, pp. 1435-1438.
[9] J. A. Christodoulides, P. Farber, M. Daniil, H. Okumura, G. C. Hadjipanayis, V. Skumryiev, A. Symopoulos, D. Weller, Magnetic, Structural and Microstructural Properties of FePt/M (M = C, BN) Granular Films, IEEE Trans. Magn., Vol. 37, No. 4, 2001, pp. 1292-1294.
[10] S. C. Chen, P. C. Kuo, S. T. Kuo, A. C. Sun, C. T. Lie, C. Y. Chou, Effect of Ti Underlayer on the Degree of Order of Fe50Pt50 Films, Mater. Sci. Eng. B, Vol 98, Iss. 3, 2003, pp. 244-247.
[11] F. M. F. Rhen, J. M. D. Coey, Electrodeposition of Coercive L10 FePt Magnets, J. Magn. Magn. Mater.,
Vol. 322, Iss. 9-12, 2010, pp. 1572-1575.
[12] N. H. Luong, T. T. Trung, T. T. Hong, N. H. Nam, M. H. Phan, P. Jenei, J. L. Labar, J. Gubicza, Relating the Magnetic Coercivity to the L10 Ordered FePd Phase in Annealed FexPd100-x Nanoparticles, Appl. Phys. A,
Vol. 128, 2022, pp. 936.
[13] N. H. Nam, T. T. Trung, L. M. Kien, T. T. Hong, N. H. Hai, N. H. Luong, Tunable Magnetic Properties of CoPt Nanoparticles: Impacts of Phase Coexistence and Thermal Annealing, J. Sci.: Adv. Mater. Devices, Vol. 8, Iss. 3, 2023, pp. 100589.
[14] J. C. Shih, H. H. Hsiao, J. L. Tsai, T. S. Chin, Low-temperature in-situ Growth of High-coercivity Fe-Pt Films, IEEE Trans. Magn., Vol. 37, No. 4, 2001, pp. 1280-1282.
[2] D. Weller, O. Mosendz, G. Parker, S. Pisana, T. S. Santos, L10 FePtX-Y Media for Heat-Assisted Magnetic Recording, Phys. Status Solidi A, Vol. 210, Iss. 7, 2013, pp. 1245-1260.
[3] Y. Hong, I. de Moraes, G. G. Eslava, S. Grenier, E. B. Amalric, A. Dias, M. Bonfim, L. Ranno, T. Devillers, N. M. Dempsey, A High Throughput Study of Both Compositionally Graded and Homogeneous Fe-Pt thin Films, J. Mater. Res. Technol., Vol. 18, 2022, pp. 1245-1255.
[4] G. H. O. Daalderop, P. J. Kelly, M. F. H. Schuurmans, Magnetocrystalline Anisotropy and Orbital Moments in Transition-metal Compounds, Phys. Rev. B, Vol. 44, No. 21, 1991, pp. 12054-12057.
[5] T. Mahalingam, J. P. Chu, J. H. Chen, S. F. Wang, K. Inoue, Microstructure and Magnetic Properties of Sputtered Fe-Pt Thin Films, J. Phys: Condensed. Matter., Vol. 15, No. 17, 2003, pp. 2561-2571.
[6] A. C. Sun, S. C. Chen, P. C. Kuo, C. Y. Chou, Y. H. Fang, J. H. Hsu, H. L. Huang, H. W. Chang, Reduction of Grain Size and Ordering Temperature in L10 FePt Thin Films, IEEE Trans. Magn., Vol. 41, No. 10, 2005,
pp. 3772-3774.
[7] D. W. Chun, S. M. Kim, G. H. Kim, W. Y. Jeung, Improvement of Magnetic Properties and Texture of FePt Thin Films on MgO Substrate by Sn Addition, J. Magnetics, Vol. 14, No. 1, 2009, pp. 7-10.
[8] N. T. T. Van, N. H. Hai, N. H. Luong, V. V. Hiep, N. Chau, Magnetic Properties of (FePt)100-xCux Thin Films, J. Korean Phys. Soc., Vol. 52, No. 5, 2008, pp. 1435-1438.
[9] J. A. Christodoulides, P. Farber, M. Daniil, H. Okumura, G. C. Hadjipanayis, V. Skumryiev, A. Symopoulos, D. Weller, Magnetic, Structural and Microstructural Properties of FePt/M (M = C, BN) Granular Films, IEEE Trans. Magn., Vol. 37, No. 4, 2001, pp. 1292-1294.
[10] S. C. Chen, P. C. Kuo, S. T. Kuo, A. C. Sun, C. T. Lie, C. Y. Chou, Effect of Ti Underlayer on the Degree of Order of Fe50Pt50 Films, Mater. Sci. Eng. B, Vol 98, Iss. 3, 2003, pp. 244-247.
[11] F. M. F. Rhen, J. M. D. Coey, Electrodeposition of Coercive L10 FePt Magnets, J. Magn. Magn. Mater.,
Vol. 322, Iss. 9-12, 2010, pp. 1572-1575.
[12] N. H. Luong, T. T. Trung, T. T. Hong, N. H. Nam, M. H. Phan, P. Jenei, J. L. Labar, J. Gubicza, Relating the Magnetic Coercivity to the L10 Ordered FePd Phase in Annealed FexPd100-x Nanoparticles, Appl. Phys. A,
Vol. 128, 2022, pp. 936.
[13] N. H. Nam, T. T. Trung, L. M. Kien, T. T. Hong, N. H. Hai, N. H. Luong, Tunable Magnetic Properties of CoPt Nanoparticles: Impacts of Phase Coexistence and Thermal Annealing, J. Sci.: Adv. Mater. Devices, Vol. 8, Iss. 3, 2023, pp. 100589.
[14] J. C. Shih, H. H. Hsiao, J. L. Tsai, T. S. Chin, Low-temperature in-situ Growth of High-coercivity Fe-Pt Films, IEEE Trans. Magn., Vol. 37, No. 4, 2001, pp. 1280-1282.