Hostname: page-component-8448b6f56d-c4f8m Total loading time: 0 Render date: 2024-04-23T20:35:42.986Z Has data issue: false hasContentIssue false
  • English
  • Français

Spectroscopic Studies of Inhomogeneous Electronic Phases in Colossal Magnetoresistance and Charge-Ordering Compounds

Published online by Cambridge University Press:  10 February 2011

S. L. Cooper ,
H. L. Liu ,
S. Yoon ,
S-W. Cheong  and
Z. Fisk
S. L. Cooper
Affiliation:
Dept. of Physics and Frederick Seitz Materials Research Laboratory U. of Illinois at Urbana-Champaign, Urbana, Illinois 61801USA
H. L. Liu
Affiliation:
Dept. of Physics and Frederick Seitz Materials Research Laboratory U. of Illinois at Urbana-Champaign, Urbana, Illinois 61801USA
S. Yoon
Affiliation:
Dept. of Physics and Frederick Seitz Materials Research Laboratory U. of Illinois at Urbana-Champaign, Urbana, Illinois 61801USA
S-W. Cheong
Affiliation:
Bell Laboratories, Lucent Technologies, Murray Hill, New Jersey 07974 and Dept. of Physics and Astronomy, Rutgers University, Piscataway, New JerseyUSA
Z. Fisk
Affiliation:
Dept. of Physics and National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32306USA
Get access

Abstract

Infrared reflectance and Raman spectroscopy measurements have been performed through the metal-semiconductor (or -semimetal) transitions of various “colossal magnetoresistance” and charge-ordering materials, including EuB6 and the manganese perovskites. As described in this paper, our results demonstrate that these systems have phase regions characterized by electronic inhomogeneity of various types, including: (1) pure spin polarons, which form in a narrow temperature range above Tc in the “colossal magnetoresistance” system EuB6; (2) magnetoelastic polarons, and an inhomogeneous ferromagnetic phase comprised of both metallic and insulating regions, in the “colossal magnetoresistance” regime of La1−x(Sr,Ca)xMnO3 (x < 0.5); and (3) phase separation behavior involving coexisting ferromagnetic and antiferromagnetic domains in the intermediatetemperature (CO) phase of the charge-ordering system Bi1−xCaxMnO3 (x > 0.5).

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 602: Symposium JJ – Magnetoresistive Oxides & Related Materials , 1999 , 167
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. Emery, V. J., Kivelson, S. A., and Zachar, O., Phys. Rev. B 56, 6120 (1997).Google Scholar
2. Moreo, A., Yunoki, S., and Dagotto, E., Science 283, 2034 (1999).Google Scholar
3. Jaime, M., Hardner, H. T., Salamon, M. B., Rubinstein, M., Dorsey, P., and Emin, D., Phys. Rev. Lett. 78, 951 (1997).Google Scholar
4. Nyhus, P., Yoon, S., Kauffman, M., Cooper, S. L., Fisk, Z., and Sarrao, J., Phys. Rev. B 56, 2717 (1997).Google Scholar
5. Emery, V. J., Kivelson, S. A., and Tranquada, J. M., Proc. Natl. Acad. Sci. 96, 8814 (1999).Google Scholar
6. Chen, C. H., Cheong, S.-W., and Cooper, A. S., Phys. Rev. Lett. 71, 2461 (1993).Google Scholar
7. Chen, C. H. and Cheong, S.-W., Phys. Rev. Lett. 76, 4042 (1996).Google Scholar
8. Nyhus, P., Cooper, S. L., and Fisk, Z., Phys. Rev. B 51, 15626 (1995).Google Scholar
9. Nyhus, P., Cooper, S. L., Fisk, Z., and Sarrao, J., Phys. Rev. B 55, 12488 (1997).Google Scholar
10. Majumdar, P. and Littlewood, P. B., Nature 395, 479 (1998).Google Scholar
11. Guy, C. N., Molnar, S. von, Etourneau, J., and Fisk, Z., Solid State Commun. 33, 1055 (1972).Google Scholar
12. Liu, H. L., Yoon, S., Cooper, S. L., Cheong, S-W., Han, P. D., and Payne, D. A., Phys. Rev. B 58, R10115 (1998).Google Scholar
13. Bao, W., Axe, J. D., Chen, C. H., and Cheong, S-W., Phys. Rev. Lett. 78, 543 (1997).Google Scholar
14. Liu, H. L., Cooper, S. L., and Cheong, S-W., Phys. Rev. Lett. 81 4684 (1998).Google Scholar
15. Kivelson, S. A., Fradkin, E., and Emery, V. J., Nature 393, 550 (1998).Google Scholar