MAGNETIC PROPERTIES AND DOMAIN STRUCTURE OF CoFeB/Pd MULTILAYERS WITH PERPENDICULAR MAGNETIC ANISOTROPY

Duy-Truong Quach

Abstract


The magnetic properties and domain structure of (CoFeB/Pd)n (n = 2 – 10) multilayers with perpendicular magnetic anisotropy have been investigated systematically. The study has been carried out by using vibration sample magnetometer (VSM) and magneto-optical Kerr effect (MOKE) microscope. The results show clear changes of magnetic hysteresis and domain structure when increasing the number of bilayer (n) from 2 to 10. With increasing the number of bilayer, the multilayers’ hysteresis loops change from square-shaped to slanted, while domain structures change from circular-like to maze.

Keywords


domain structure, Kerr effect, hysteresis loops

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References


Mangin S, Ravelosona D, Katine J A, Carey M J, Terris B D and Fullerton E E, “Current-induced magnetization reversal in nanopillars with perpendicular anisotropy”, Nat. Mater. 5, (2006) 210-215.

Boulle O, Kimling J, Warnicke P, Kll’aui M, Rüdiger U, Malinowski G, Swagten H J M, Koopmans B, Ulysse C and Faini G, “Nonadiabatic Spin Transfer Torque in High Anisotropy Magnetic Nanowires with Narrow Domain Walls”, Phys. Rev. Lett. 101, (2008) 216601-1-216601-4.

Yakata S, Kubota H, Suzuki Y, Yakushiji K, Fukushima A, Yuasa S and Ando K, “Influence of perpendicular magnetic anisotropy on spin-transfer switching current in CoFeB∕MgO∕CoFeB magnetic tunnel junctions”, J. Appl. Phys. 105, (2009) 07D131-1-07D131-3.

Misako Ogiwara, Satoshi Iihama, Takeshi Seki, Takayuki Kojima, Shigemi Mizukami, Masaki Mizuguchi and Koki Takanashi “Magnetization damping of an L1(0)-FeNi thin film with perpendicular magnetic anisotropy”, Appl. Phys. Lett. 103, (2013) 242409-1-242409-5.

Yao-Jen Chang, A. Canizo-Cabrera, Valentin Garcia-Vazquez, Yang-Hua Chang and Te-ho Wu, “Effect of Ta thickness on the perpendicular magnetic anisotropy in MgO/CoFeB/Ta/[Co/Pd](n) structures”, J. Appl. Phys. 114, (2013) 184303-1-184303-4.

X. W. Guan, X. W. Cheng, T. Huang et al., “Interface structure and magnetism of CoFe/A1-FePt films with perpendicular magnetic anisotropy”, J. Appl. Phys. 116, (2014) 213910-1-213910-5.

A. I. Figueroa, J. Bartolome, L. M. Garcia, L. M et al., “Structural and magnetic properties of granular Co-Pt multilayers with perpendicular magnetic anisotropy”, Phys. Rev. B 90, (2014) 174421-1-174421-16.

Desai Zhang, M. Justin Shaw, J. David Smith et al., “Domain structure and perpendicular magnetic anisotropy in CoFe/Pd multilayers using off-axis electron holography”, J. Magn. Magn. Mater. 388, (2015) 16-21.

Bandiera S, Sousa R C, Rodmacq B and Dieny B, “Enhancement of perpendicular magnetic anisotropy through reduction of Co-Pt interdiffusion in (Co/Pt) multilayers”, Appl. Phys. Lett. 100, (2012) 142410-1-142410-4.

Jamali M, Narayanapillai K, Qiu X, Loong L M, Manchon A and Yang H, “Spin-Orbit Torques in Co/Pd Multilayer Nanowires”, Phys. Rev. Lett. 111, (2013) 246602-1-246602-5.

Hashimoto S, Ochiai Y and Aso K, “Perpendicular magnetic anisotropy and magnetostriction of sputtered Co/Pd and Co/Pt multilayered films”, J. Appl. Phys. 66, (1989) 4909-4916.

Bae J, Kim H-J, Chang J, Han S H, Koo H C and Lim S H, “Effect of the buffer layer on the magnetic properties in CoFe/Pd multilayers”, J. Korean Phys. Soc. 61, (2012) 1500-1504.

Ngo D-T, Meng Z L, Tahmasebi T, Yu X, Thoeng E, Yeo L H, Rusydi A, Han G C and Teo K-L, “Interfacial tuning of perpendicular magnetic anisotropy and spin magnetic moment in CoFe/Pd multilayers”, J. Magn. Magn. Mater. 350, (2014) 42-46.

Thiele J-U, Folks L, Toney M F and Weller D K, “Perpendicular magnetic anisotropy and magnetic domain structure in sputtered epitaxial FePt (001) L10 films”, J. Appl. Phys. 84, 10 (1998) 5686-5692.

Lin C-J and Gorman G L, “Evaporated CoPt alloy films with strong perpendicular magnetic anisotropy”, Appl. Phys. Lett. 61, 13 (1992) 1600-1602.

Ikeda S, Miura K, Yamamoto H, Mizunuma K, Gan H D, Endo M, Kanai S, Hayakawa J, Matsukura F and Ohno H, “A perpendicular-anisotropy CoFeB-MgO magnetic tunnel junction.”, Nat. Mater. 9, (2010) 721-724.

Huang S X, Chen T Y and Chien C L, “Spin polarization of amorphous CoFeB determined by point-contact Andreev reflection”, Appl. Phys. Lett. 92, (2008) 242509-1-242509-3.

Jong Ho Jung, Boram Jeong, Sang Ho Lim, and Seong-Rae Lee, “Strong Perpendicular Magnetic Anisotropy in CoFeB/Pd Multilayers”, Applied Physics Express 3, (2010) 023001-1-023001-3.

B. Cui, C. Song, G.Y. Wang, Y.Y. Wang, F. Zeng, F. Pan, “Perpendicular magnetic anisotropy in CoFeB/X (X = MgO, Ta, W, Ti, and Pt) multilayers”, Journal of Alloys and Compounds 559, (2013) 112–115.

Michihiko Yamanouchi, Albrecht Jander, Pallavi Dhagat, Shoji Ikeda, Fumihiro Matsukura, and Hideo Ohno, “Domain Structure in CoFeB Thin Films With Perpendicular Magnetic Anisotropy”, IEEE Magn. Lett. 2 (2011) 3000304.

C. Burrowes, N. Vernier, J.-P. Adam, L. Herrera Diez, K. Garcia, I. Barisic, G. Agnus, S. Eimer, Joo-Von Kim, T. Devolder, A. Lamperti, R. Mantovan, B. Ockert, E. E Fullerton, and D. Ravelosona, “Low depinning fields in Ta-CoFeB-MgO ultrathin films with perpendicular magnetic anisotropy”, Appl. Phys. Lett. 103, (2013) 182401-1-182401-5.

M. Kisielewski, A. Maziewski, M. Tekielak, J. Ferre, S. Lemerle, V. Mathet, C. Chappert, “Magnetic anisotropy and magnetization reversal processes in Pt/Co/Pt films”, J. Magn. Magn. Mater. 260, (2003) 231-243.




DOI: https://doi.org/10.15625/2525-2518/57/6/13885 Display counter: Abstract : 30 views. PDF : 6 views.

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