Hostname: page-component-cd9895bd7-mkpzs Total loading time: 0 Render date: 2024-12-26T11:36:55.955Z Has data issue: false hasContentIssue false
  • English
  • Français

Substituted Barium Hexaferrite Films for Planar Integrated Phase Shifters

Published online by Cambridge University Press:  10 February 2011

S.A. Oliver ,
S.D. Yoon ,
I. Kozulin ,
P. Shi ,
X. Zuo  and
C. Vittoria
S.A. Oliver
Affiliation:
Center for Electromagnetic Research, Northeastern University, Boston MA 02115, saoliver@neu.edu
S.D. Yoon
Affiliation:
Department of Electrical and Computer Engineering, Northeastern University, Boston MA 02115
I. Kozulin
Affiliation:
Department of Electrical and Computer Engineering, Northeastern University, Boston MA 02115
P. Shi
Affiliation:
Department of Electrical and Computer Engineering, Northeastern University, Boston MA 02115
X. Zuo
Affiliation:
Department of Electrical and Computer Engineering, Northeastern University, Boston MA 02115
C. Vittoria
Affiliation:
Department of Electrical and Computer Engineering, Northeastern University, Boston MA 02115
Get access

Abstract

Thick films of scandium-substituted BaScxFe12−xO19 (x=0, 0.4, 0.6) were deposited by pulsed laser ablation deposition onto A-plane (1120) sapphire (Al2O3) substrates to yield highly oriented films having the crystallographic c-axis ([0001]) in the film plane. Selected films were characterized by x-ray diffraction, electron microscopy, magnetometry and torque magnetometry measurements. These structural and magnetic measurements show that dense films have excellent in-plane uniaxial anisotropies and good square loop behaviors. Such films will be useful for planar latched phase shifters that can be integrated into microwave integrated circuits.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 603: Symposium KK – Materials Issues for Tunable RF & Microwave Devices , 1999 , 101
Copyright
Copyright © Materials Research Society 2000

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

1. For a review of ferrite based phase shifters, see for example, Koul, S.K. and Bhat, B., Microwave and Millimeter Wave Phase Shifters, vol. 1, Artech House, Boston, 1991, pp. 315–384, and references therein.Google Scholar
2. Glass, H.L., Proc. IEEE 76, p. 151–158 (1988).10.1109/5.4391Google Scholar
3. Dionne, G.F. and Fitzgerald, J.F., J.Appl.Phys. 70, p. 6140–6142 (1991).10.1063/1.350022Google Scholar
4. Dorsey, P.C., Chrisey, D.B., Horwitz, J.S., Lubitz, P. and Auyeung, R.C.Y., IEEE Trans. Magnetics 30, p. 4512–4517 (1994).10.1109/20.334133Google Scholar
5. Röschmann, P., Lemke, M., Tolksdorf, W. and Welz, F., Mat. Res. Bull. 19, p. 385–392 (1984).10.1016/0025-5408(84)90181-8Google Scholar
6. Silber, L.M. and Wilber, W.D., IEEE Trans. Magn. 22, p. 984 (1986).10.1109/TMAG.1986.1064408Google Scholar
7. Shinde, S.R., Lofland, S.E., Ganpule, C.S., Ogale, S.B., Bhagat, S.M., Venkatesan, T. and Ramesh, R., J. Appl. Phys. 85, p. 7459–7465 (1999).10.1063/1.369379Google Scholar
8. International Center for Diffraction Data (ICDD) card numbers 39-1433 and 43-0002.Google Scholar