Hostname: page-component-586b7cd67f-vdxz6 Total loading time: 0 Render date: 2024-11-24T10:28:16.695Z Has data issue: false hasContentIssue false
  • English
  • Français

Colossal Temperature Coefficient of Resistivity in Epitaxial Colossal Magnetoresistive La0.67Ca0.33MnO3 Films

Published online by Cambridge University Press:  21 March 2011

S.I. Khartsev  and
A.M. Grishin
S.I. Khartsev
Affiliation:
KTH, Department of Microelectronics and Information Technology, S-164 40 Kista, SWEDEN
A.M. Grishin
Affiliation:
KTH, Department of Microelectronics and Information Technology, S-164 40 Kista, SWEDEN
Get access

Abstract

Epitaxial La0.67Ca0.33MnO3(LCMO) films have been grown by pulsed laser deposition technique on three single crystal substrates: LaAlO3, SrTiO3, and NdGaO3 having lattice mismatch with LCMO film of + 1.26 %, - 0.9 %, and + 0.18 %. We found the transport colossal magnetoresistive (CMR) properties were improved with the reduction of a film/substrate mismatch. Processing conditions for LCMO film on NdGaO3substrate were optimized as well as post-annealing process was employed to achieve a superior temperature coefficient of resistivity TCR = 35 %K−1 and the magnetoresistance MR = 66 % at 7 kOe. To our knowledge, these are the record CMR parameters achieved so far.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 666: Symposium F – Transport and Microstructural Phenomena , 2001 , F7.12
Copyright
Copyright © Materials Research Society 2001

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

1 Lisauskas, Alvydas, Khartsev, S.I., Grishin, Alex, Appl. Phys. Lett. 77, 756 (2000); 77, 3302 (2000).Google Scholar
2 Khartsev, S.I., Johnsson, P., Grishin, A.M., J. Appl. Phys. 87, 2394 (2000).Google Scholar
3 Freisem, S., Brockhoff, A., Groot, D.G. de, Dam, B., Aarts, J., J. Magn. Magn. Mater. 165, 380 (1997).Google Scholar
4 Gommert, E., Cerva, H., Wecker, J., Samwer, K., J. Appl. Phys. 85, 5417 (1999).Google Scholar
5 Goyal, A., Rajeswari, M., Shreekala, R., Lofland, S.E., Bhagat, S.M., Boettcher, T., Kwon, C., Ramesh, R., Venkatesan, T., Appl. Phys. Lett. 71, 2535 (1997).Google Scholar
6 Shreekala, R., Rajeswari, M., Pai, S.P., Lofland, S.E., Smolyaninova, V., Ghosh, K., Ogale, S.B., Bhagat, S.M., Downes, M.J., Greene, R.L., Ramesh, R., Venkatesan, T., J. Appl. Phys. 74, 2857 (1999).Google Scholar