Hostname: page-component-78c5997874-fbnjt Total loading time: 0 Render date: 2024-11-10T08:29:14.612Z Has data issue: false hasContentIssue false
  • English
  • Français

Study on Electronic Structure and Magnetic Properties of Ni3Fe Ferromagnetic Layer Adjacent to Cu

Published online by Cambridge University Press:  03 March 2011

Xiaofang Bi ,
Xiaoyu Yuan ,
Shengkai Gong  and
Huibin Xu
Xiaofang Bi
Affiliation:
School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, People’s Republic of China
Xiaoyu Yuan
Affiliation:
School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, People’s Republic of China
Shengkai Gong
Affiliation:
School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, People’s Republic of China
Huibin Xu
Affiliation:
School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, People’s Republic of China
Get access

Abstract

The effect of a Cu layer on the electronic structure and magnetic properties of Ni3Fe was studied by employing the discrete-variational method in the framework of density-functional theory. Three models were established for Ni3Fe(6), Ni3Fe(3)/Cu(3)/Ni3Fe(3), and Ni3Fe(3)/Cu(3). The charge transfer, magnetic moment, and spin exchange split at the Fermi level were obtained for Fe and Ni atoms in a Ni3Fe layer. The related characterizations of Ni3Fe were estimated from those of Fe and Ni atoms. It was discovered that the magnetic properties of the Ni3Fe layer improved when adjacent to Cu layer due to the improvement of the corresponding properties of the Fe atoms in the Ni3Fe. However, the magnetic moment and the spin exchange split of the Ni atoms in the Ni3Fe decreased when the Ni3Fe was adjacent to a Cu layer.

Keywords

Electronic structureMagnetic properties
Type
Articles
Information
Journal of Materials Research , Volume 20 , Issue 1 , January 2005 , pp. 36 - 41
Copyright
Copyright © Materials Research Society 2004

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1Shinjo, T. and Yamamoto, H.: Large magnetoresistance of field-induced giant ferrimagnetic multilayers. J. Phys. Soc. Jpn. 59, 3061 (1990).CrossRefGoogle Scholar
2Bae, S., Li, J., Judy, J.H. and Zurn, S.: Effects of grain cluster size on coercivity and giant magnetoresistance of NiFe/Cu/CoFe/Cu/NiFe pseudo spin valves. Appl. Phys. Lett. 77, 3435 (2000).CrossRefGoogle Scholar
3Paul, A., Damm, T., Burgler, D.E., Stein, S., Kohlstedt, H. and Grunberg, P.: Optimizing the giant magnetoresistance of NiFe/Cu/Co pseudo spin-valves prepared by magnetron sputtering. Appl. Phys. Lett. 82, 1905 (2003).CrossRefGoogle Scholar
4Wulfhekel, W., Knappmann, S. and Oepen, H.P.: Magnetic anisotropy of Co on Cu (1 1 1). J. Appl. Phys. 79, 988 (1996).CrossRefGoogle Scholar
5Lottis, D., Fert, R., Morel, A., Pereira, L.G., Jacquet, J.C., Galtier, P., Coutellier, J.M. and Valet, T.: Magnetoresistance in rf-sputtered (NiFe/Cu/Co/Cu) spin-valve multilayers. J. Appl. Phys. 73, 5515 (1993).CrossRefGoogle Scholar
6Sakakima, H., Irie, Y., Kawawake, Y. and Satomi, M.: Spin-value multilayers of [H/Cu/S] (H=Co, Co-Pt, or Co-Fe, S=NiFeCo) and memory cells. J. Magn. Magn. Mater. 156, 405 (1996).CrossRefGoogle Scholar
7Jay, J.P., Youssef, J.B. and Gall, H.L.: Dynamic response of permalloy/Cu/Co magnetoresistive sandwiches. J. Magn. Magn. Mater. 240, 287 (2002).CrossRefGoogle Scholar
8Parkin, S.S.P., Li, Z.G. and Smith, D.J.: Giant magnetoresistance in antiferromagnetic Co/Cu multilayers. Appl. Phys. Lett. 58, 2710 (1991).CrossRefGoogle Scholar
9Parkin, S.S.P.: Dramatic enhancement of interlayer exchange coupling and giant magnetoresistance in Ni81Fe19/Cu multilayers by addition of thin Co interface layers. Appl. Phys. Lett. 61, 1358 (1992).CrossRefGoogle Scholar
10Chen, J., Mao, S., Castro, J.F., Choy, T.S. and Hershfield, S.: Modeling and experiment of transport properties of spin-valves with synthetic antiferromagnet. IEEE Trans. Magn. 36, 2885 (2000).CrossRefGoogle Scholar
11Hong, J. and Kanai, H.: Interlayer exchange coupling in spin valves with specularly reflective oxide layers. J. Appl. Phys. 93, 2095 (2003).CrossRefGoogle Scholar
12Kai, X.Y., Bi, X.F. and Shiiki, K.: Study of giant magnetoresistance in Co/X superlattices (X=Cu, Ru, Rh and Pd) by first-principle band calculation. J. Magn. Magn. Mater. 183, 292 (1998).CrossRefGoogle Scholar
13Yuan, X.Y., Bi, X.F., Shang, J.X. and Xu, H.B.: Study on the interfacial characterization of the Co5/Cu3/Co5 trilayer and Co3/Cu/Co/Cu3/Co/Cu/Co3 multilayer. J. Mater. Res. 19, 741 (2004).CrossRefGoogle Scholar
14Ellis, D.E. and Painter, G.S.: Discrete variational method for the energy-band problem with general crystal potentials. Phys. Rev. B 2, 2887 (1970).CrossRefGoogle Scholar
15Ellis, D.E., Benesh, G.A. and Byrom, E.: Molecular cluster studies of binary alloys: LiAl. Phys. Rev. B 16, 3308 (1977).CrossRefGoogle Scholar
16Guenzburger, D. and Ellis, D.E.: Magnetism of Fe impurities in alkaline-earth metals and Al. Phys. Rev. B 45, 285 (1992).CrossRefGoogle ScholarPubMed
17Zeng, Z., Guenzburger, D. and Ellis, D.E.: Electronic structure, spin couplings, and hyperfine properties of nanoscale molecular magnets. Phys. Rev. B 59, 6927 (1999).CrossRefGoogle Scholar
18Gomez, J.A. and Guenzburger, D.: Influence of conduction electrons on the magnetism of cobalt grains in a copper matrix studied by density-functional theory. Phys. Rev. B 63, 134404 (2001).CrossRefGoogle Scholar
19Von Barth, U. and Hedin, L.: A local exchange-correlation potential for the spin polarized case. I. J. Phys. C: Solid State Phys. 5, 1629 (1972).CrossRefGoogle Scholar
20Butler, W.H., Zhang, X.G., Nicholson, D. and MacLaren, J.M.: Spin-dependent scattering and giant magnetoresistance. J. Magn. Magn. Mater. 151, 354 (1995).CrossRefGoogle Scholar
21Tersoff, J. and Falicov, L.M.: Magnetic and electronic properties of Ni films, surfaces, and interfaces. Phys. Rev. B 26, 6186 (1982).CrossRefGoogle Scholar
22Tersoff, J. and Falicov, L.M.: Interface magnetization: Cu films on Ni (100). Phys. Rev. B 25, 2959 (1982).CrossRefGoogle Scholar