Abstract
The study of the substitution of magnesium for manganese in the type I Pr0.7(Ca,Sr) 0.3MnO3 and type II Pr0.5Sr0.5MnO3 manganites has been performed. Remarkable colossal magneto resistance (CMR) properties have been evidenced for the manganites Pr0.7Ca0.2Sr0.1 Mn1 xMgxO3, with x ≤ 0.02, for which ROT/R7T resistance ratio values ranging from 104 to 4.105 at 105 K and 70 K respectively were obtained in a magnetic field of 7 T. The study of the type II phases Pr0.5Sr0.5M1 xMgxO3, shows their similarity with the trivalent metal doped manganites Pr0.5Mn1−x MxO3 with M = Al, Ga, In, in contrast to the tetravalent metal doped manganites with M = Ti, Sn. The latter properties are interpreted in terms of two factors, the molar ratio Mn(III): Mn(IV), and the size of the doping cation.
Similar content being viewed by others
References
Kusters, R.M., Singleton, J., Keen, D.A., McGreevy, R.M., Hayes, W.: Physica B 155, 362 (1989)
Urushibara, A., Moritomo, Y., Arima, T., Asamitsu, A., Kido, G., Tokura, Y.: Phys. Rev. B 51, 14103 (1995)
Tomioka, Y., Asamitsu, A., Moritomo, Y., Tokura, Y.: Phys. Rev. Lett. 74, 5108 (1995); J. Phys. Soc. Jpn. 64, 3626 (1995)
Raveau, B., Maignan, A., Simon, Ch., Caignaert, V.: J. Solid State Chem. 117, 424 (1995); Solid State Commun. 96, 623 (1995)
Maignan, A., Caignaert, V., Simon, Ch., Hervieu, M., Raveau, B.: J. Mater. Chem. 5,1089 (1995); Z. Phys. B 99, 305 (1996); J. Appl. Phys. 79, 7891 (1996)
Mahendiran, R., Mahesh, R., Rangavittal, N., Tiwari, S.K., Raychaudhuri, A.K., Ramakrishnan, J.V., Rao, C.N.R.: Phys. Rev. B 53, 3348 (1996)
Mahesh, R., Mahendiran, R., Raychaudhuri, A.K., Rao, C.N.R.: J. Solid State Chem. 120, 204 (1995)
Martin, C., Maignan, A., Raveau, B.: J. Mat. Chem. 6, 1245 (1996)
Maignan, A., Martin, C., Raveau, B.: Z. Phys. B (accepted for publication)
Damay, F., Maignan, A., Nguyen, N., Raveau, B.: J. Solid State Chem.: 124, 385 (1996)
Tokura, Y., Kuwahara, H., Moritomo, Y., Tomioka, Y., Asamitsu, A.: Phys. Rev. Lett. 76, 3184 (1996)
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Maignan, A., Raveau, B. Magnesium, a promising dopant for the improvement of the CMR properties of perovskite manganites. Z. Phys. B 102, 299–305 (1997). https://doi.org/10.1007/s002570050292
Received:
Revised:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s002570050292