- F. Zhang, J. Zachary Hilt, and Michael J. Pechan
- Physics Department, Miami University, Oxford, Ohio 45056
-
(Received 4 September 1998; revised 14 December 1998)
hcp(100) Co/Re superlattices were grown via magnetron sputtering on Al2O3(110) substrates. The thickness of the Co layers was approximately 1.8 nm with the Re layer thickness varying between 0.5 nm and 3.0 nm. Low angle x-ray reflectivity revealed that for our growth conditions the interfacial roughness is approximately 0.4 nm in each material at each interface. High angle x-ray diffraction, together with off-specular x-ray diffraction, showed that the growth is epitaxial with the [0001] axis in-plane and parallel to the Al2O3[0001] axis. Magnetization measurements indicate the presence of an in-plane uniaxial anisotropy in all samples and antiferromagnetic coupling when the Re layer thicknesses are less than 1.0 nm and close to 2.0 nm. The uniaxial anisotropy was measured via ferromagnetic resonance and determined to be approximately 5 times smaller than in bulk Co for thicker Re layer samples. For thin Re samples, a spin-flop transition causes a competition between the anisotropic magnetoresistance and the giant magnetoresistance when the external field is applied parallel to the easy axis. The most notable consequence is that the magnetoresistance is positive for small fields and negative for large fields when the current is perpendicular to the applied field. We also report a magnetoresistance of ~ 4.5% at 10 K, more than twice the maximum value previously reported for hcp(0001) Co/Re multilayers. Co/Re hcp(100) superlattices provide a new system whereby the role of in-plane magnetic anisotropy in the magnetoresistance of metallic superlattices can be studied.
©1999 The American Physical Society
URL: http://link.aps.org/abstract/PRB/v59/p11897
PACS:
75.70.Cn, 75.70.Pa, 75.30.Gw
Additional Information
Full Text: [
PDF (245 kB)
GZipped PS
Order Document ]
References
Citation links [e.g., Phys. Rev. D 40, 2172 (1989)] go to online journal abstracts. Other links (see Reference Information) are available with your current login. Navigation of links may be more efficient using a second browser window.
-
M. N. Baibich, J. M. Broto, A. Fert, F. Nguyen Van Dau, F. Petroff, P. Etienne, G. Creuzet, A. Friederich, and J. Chazelas, Phys. Rev. Lett. 61, 2472 (1988).
-
P. Grünberg, R. Schreiber, Y. Pang, M. B. Brodsky, and H. Sowers, Phys. Rev. Lett. 57, 2442 (1986).
-
S. S. P. Parkin, N. More, and K. P. Roche, Phys. Rev. Lett. 64, 2304 (1990).
-
For a review, see A. Fert, P. Grünberg, A. Barthélémy, F. Petroff, and W. Zinn, J. Magn. Magn. Mater. 140-144, 1 (1995). [INSPEC]
-
P. P. Freitas, L. V. Melo, I. Trindade, M. From, J. Ferreira, and P. Monteiro, Phys. Rev. B 45, 2495 (1992).
-
L. V. Melo, I. Trinidade, M. From, P. P. Freitas, N. Teixeira, M. F. da Silva, and J. C. Soares, J. Appl. Phys. 70, 7370 (1991).
-
E. E. Fullerton, M. J. Conover, J. E. Mattson, C. H. Sowers, and S. D. Bader, Phys. Rev. B 48, 15 755 (1993).
-
J. C. A. Huang, Y. Liou, Y. D. Yao, W. T. Yang, C. P. Chang, S. Y. Liao, and Y. M. Hu, Phys. Rev. B 52, R13 110 (1995).
-
Th. Zeidler, K. Theis-Bröhl, and H. Zabel, J. Magn. Magn. Mater. 187, 1 (1998) (ScienceDirect). [INSPEC]
-
J. J. Picconatto, M. J. Pechan, and E. E. Fullerton, J. Appl. Phys. 81, 5058 (1997).
-
G. R. Harp and S. S. P. Parkin, Appl. Phys. Lett. 65, 3063 (1994).
-
H. Yanigihara, K. Pettit, M. B. Salamon, E. Kita, and S. S. P. Parkin, J. Appl. Phys. 81, 5197 (1997).
-
R. W. Wang, D. L. Mills, E. E. Fullerton, J. E. Mattson, and S. D. Bader, Phys. Rev. Lett. 72, 920 (1994).
-
S. K. Sinha, E. B. Sirota, S. Garoff, and H. B. Stanley, Phys. Rev. B 38, 2297 (1988).
-
B. Vidal and P. Vincent, Appl. Opt. 23, 1794 (1984). [SPIN]
-
M. A. Tomaz, G. R. Harp, E. Mayo, D. Lederman, R. Wu, and W. L. O'Brien, J. Vac. Sci. Technol. A 16, 1336 (1998).
-
M. M. Schwickert, R. Coehoorn, M. A. Tomaz, E. Mayo, D. Lederman, W. L. O'Brien, T. Lin, and G. R. Harp, Phys. Rev. B 57, 13 681 (1998).
-
For a review of MOKE in thin films, see S. D. Bader and J. L. Erskine, in Ultrathiin Magnetic Structures II, edited by B. Heinrich and J. A. C. Bland (Springer-Verlag, Berlin, 1994), p. 297.
-
F. Schreiber, Z. Frait, Th. Zeidler, N. Metoki, W. Donner, H. Zabel, and J. Plezl, Phys. Rev. B 51, 2920 (1995).
-
Binary Alloy Phase Diagrams (ASM International, Materials Park, OH, 1990), p. 1229.
-
E. E. Fullerton, I. K. Schuller, H. Vanderstraeten, and Y. Bruynseraede, Phys. Rev. B 45, 9292 (1992).
-
T. Charlton, D. Lederman, S. M. Yusuf, and G. Felcher, J. Appl. Phys. (to be published).
-
C. A. Ramos, D. Lederman, A. R. King, and V. Jaccarino, Phys. Rev. Lett. 65, 2913 (1990).
-
S. Chikazumi, Physics of Magnetism (Wiley, New York, 1964), p. 129.
-
J. Z. Hilt, J. J. Picconatto, A. O'Brien, M. J. Pechan, and E. E. Fullerton, J. Magn. Magn. Mater. (to be published).
-
M. Grimsditch, E. E. Fullerton, and R. L. Stamps, Phys. Rev. B 56, 2617 (1997).
-
J. Smit, Physica (Amsterdam) 16, 612 (1951).
-
For a review, see I. A. Campbell and A. Fert, in Ferromagnetic Materials, edited by E. P. Wohlfarth (North-Holland, Amsterdam, 1982).
-
P. P. Freitas, A. A. Gomes, T. R. McGuire, and T. S. Plaskett, J. Magn. Magn. Mater. 83, 113 (1990). [INSPEC]
-
C. Kittel, Introduction to Solid State Physics, 6th ed. (Wiley, New York, 1986), p. 144.
-
W. Folkerts, J. Magn. Magn. Mater. 94, 302 (1991). [INSPEC]
The American Physical Society is a member of
CrossRef.
Full Text: [
PDF (245 kB)
GZipped PS
Order Document ]
Citing Articles
This list contains links to other online articles that cite the article currently being viewed.
-
Temperature dependence of the magnetoresistance in Co/Re superlattices on Al2O3 (110)
T. Charlton et al., Phys. Rev. B 63, 094404 (2001)
Full Text: [
PDF (245 kB)
GZipped PS
Order Document ]
[
Previous /
Next Abstract |
Issue Table of Contents
| Top of Page ]
Article Collection: View
Collection Help (Click on the to add an article.)
[ Homepage |
Browse Available Volumes |
Search |
Subscriptions |
Contact Information |
Online Help |
Exit ]