Abstract
Doping of the Mn-site in Ln1-yAyMn1-xMxO3 manganites has been extensively investigated. For the manganites exhibiting a Curie temperature (TC) these substitutions depress TC. However, the effect on TC is doping-element dependent. It decreases from dTC/dx = -25 K %-1 for M = Fe down to dTC/dx ∼ 0 K %-1 for M = Cr in the series Sm0.56Sr0.44Mn1-xMxO3. The peculiar role of chromium doping is also shown in the case of the charge-ordered Ln0.5Ca0.5MnO3-substituted manganites that are characterized by low average cationic size on the A-site and cationic size mismatch. For the latter, metal-insulator transitions together with CMR properties are induced by Cr and to a smaller extent by Co and Ni. The hindering of the charge-ordering establishment by these 'impurity effects' is also observed in the case of the two-dimensional manganites La0.5Sr1.5MnO4 and LaSr2Mn2O7. The highest efficiency of Cr among all doping elements may be ascribed to the similar t3 2g electronic configurations of Cr3+ and Mn4+ which allow a double-exchange between the Cr3+ and Mn3+ species.
| Original language | English |
|---|---|
| Pages (from-to) | 1635-1659 |
| Number of pages | 25 |
| Journal | Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences |
| Volume | 356 |
| Issue number | 1742 |
| DOIs | |
| Publication status | Published - 15 Jul 1998 |
| Externally published | Yes |
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Keywords
- Antiferromagnetism
- Ferromagnetism
- Insulator-metal
- Magnetoresistance
- Manganite
- Mn-site doping
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The effect of Mn-site doping on the magnetotransport properties of CMR manganites: discussion. / Maignan, A.; Damay, F.; Barnabé, A.; Martin, C.; Hervieu, M.; Raveau, B.; Palstra, Thom T.M. .
In: Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 356, No. 1742, 15.07.1998, p. 1635-1659.Research output: Contribution to journal › Article › Academic › peer-review
TY - JOUR
T1 - The effect of Mn-site doping on the magnetotransport properties of CMR manganites: discussion
AU - Maignan, A.
AU - Damay, F.
AU - Barnabé, A.
AU - Martin, C.
AU - Hervieu, M.
AU - Raveau, B.
AU - Palstra, Thom T.M.
PY - 1998/7/15
Y1 - 1998/7/15
N2 - Doping of the Mn-site in Ln1-yAyMn1-xMxO3 manganites has been extensively investigated. For the manganites exhibiting a Curie temperature (TC) these substitutions depress TC. However, the effect on TC is doping-element dependent. It decreases from dTC/dx = -25 K %-1 for M = Fe down to dTC/dx ∼ 0 K %-1 for M = Cr in the series Sm0.56Sr0.44Mn1-xMxO3. The peculiar role of chromium doping is also shown in the case of the charge-ordered Ln0.5Ca0.5MnO3-substituted manganites that are characterized by low average cationic size on the A-site and cationic size mismatch. For the latter, metal-insulator transitions together with CMR properties are induced by Cr and to a smaller extent by Co and Ni. The hindering of the charge-ordering establishment by these 'impurity effects' is also observed in the case of the two-dimensional manganites La0.5Sr1.5MnO4 and LaSr2Mn2O7. The highest efficiency of Cr among all doping elements may be ascribed to the similar t3 2g electronic configurations of Cr3+ and Mn4+ which allow a double-exchange between the Cr3+ and Mn3+ species.
AB - Doping of the Mn-site in Ln1-yAyMn1-xMxO3 manganites has been extensively investigated. For the manganites exhibiting a Curie temperature (TC) these substitutions depress TC. However, the effect on TC is doping-element dependent. It decreases from dTC/dx = -25 K %-1 for M = Fe down to dTC/dx ∼ 0 K %-1 for M = Cr in the series Sm0.56Sr0.44Mn1-xMxO3. The peculiar role of chromium doping is also shown in the case of the charge-ordered Ln0.5Ca0.5MnO3-substituted manganites that are characterized by low average cationic size on the A-site and cationic size mismatch. For the latter, metal-insulator transitions together with CMR properties are induced by Cr and to a smaller extent by Co and Ni. The hindering of the charge-ordering establishment by these 'impurity effects' is also observed in the case of the two-dimensional manganites La0.5Sr1.5MnO4 and LaSr2Mn2O7. The highest efficiency of Cr among all doping elements may be ascribed to the similar t3 2g electronic configurations of Cr3+ and Mn4+ which allow a double-exchange between the Cr3+ and Mn3+ species.
KW - Antiferromagnetism
KW - Ferromagnetism
KW - Insulator-metal
KW - Magnetoresistance
KW - Manganite
KW - Mn-site doping
UR - http://www.scopus.com/inward/record.url?scp=3142563310&partnerID=8YFLogxK
U2 - 10.1098/rsta.1998.0239
DO - 10.1098/rsta.1998.0239
M3 - Article
VL - 356
SP - 1635
EP - 1659
JO - Philosophical transactions of the Royal Society A- mathematical physical and engineering sciences
JF - Philosophical transactions of the Royal Society A- mathematical physical and engineering sciences
SN - 1364-503X
IS - 1742
ER -