Skip to main content Accessibility help
×
Home

Layered CMR Manganites: Structure, Properties, and Unconventional Magnetism

  • J. F. Mitchell (a1), D. N. Argyriou (a1), C. D. Potter (a1), J. D. Jorgensen (a1), D. G. Hinks (a1) and S. D. Bader (a1)...

Abstract

Neutron powder diffraction studies of the layered compounds R1.2Sr1.8Mn2O7, (R = La,Pr, Nd), RSr2Mn2O7 (R = Pr,Nd),and La1.4Sr1.6Mn2O7 show that the degree of distortion of the MnO6 octahcdra do not correlate with the appearance of a metal-insulator (MI) transition in these compounds. Instead, the in-plane Mn-O bond length appears to be a better indicator of the electronic behavior. Detailed bulk magnetization studies on single crystal La1.2Sr1.8Mn2O7 show thai there are three magnetic regimes as a function of temperature: paramagnetic insulator, short-range ordered (SRO) fcrrromangct, and long-range ordered (LRO) fcrromagnct. Scaling analysis indicates that a 2D finite-size XY model is an appropriate description of the magnetic state in the SRO regime.

Copyright

References

Hide All
1. Shimakawa, Y., Kubo, Y. and Manako, T., Naure 379, 53 (1996).
2. Cheong, S-W., Hwang, H.Y., Batlogg, B. and Rupp, L.W. Jr, Solid State Comm. 98, 163 (1996).
3. Moritomo, Y., Asamilsu, A., Kuwahara, H. and Tokura, Y., Nature 380, 141 (1996).
4. Seshadri, R., Martin, C., Maignan, A., Hervieu, M., Raveau, B. and Ramachandra Rao, C.N., J. Mater. Chem. 6, 1585 (1996).
5. Mitchell, J.F., Argyriou, D.N., Jorgensen, J.D., Hinks, D.G., Potter, C.D. and Bader, S.D. Phys. Rev. B., in press.
6. Potter, C.D., Swiatek, M., Argyriou, D.N., Mitchell, J.F., Hinks, D.G., Jorgensen, J.D. and Bader, S.D., submitted to Phys. Rev. Lett.
7. Argyriou, D.N., Potter, C.D., Mitchell, J.F., Jorgensen, J.D., Kleb, R. and Bader, S.D., submitted to Phys. Rev. Lett.
8. Caignaert, V., Suard, E., Maignan, A., Simon, C. and Raveau, B., J. Magn. Magn. Mater. 153, L260(1996).

Layered CMR Manganites: Structure, Properties, and Unconventional Magnetism

  • J. F. Mitchell (a1), D. N. Argyriou (a1), C. D. Potter (a1), J. D. Jorgensen (a1), D. G. Hinks (a1) and S. D. Bader (a1)...

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed.