Abstract
The colossal magnetoresistance (CMR) materials have attracted considerable attention recently. In this report, the results of detailed investigation of the structural and magnetic properties of the La0.7-xPrxPb0.3MnO3 (0 ≦ x ≦ 0.7) over a wide range of compositions are presented and compared with the consequences deduced from classical magnetic mechanism in this article. The regular replacement of smaller Pr ion in the La site causes structure change from rhombohedral symmetry with space group R3c to orthorhombic structure. Therefore, the introduction of praseodymium enhances the distortion of the perovskite, diminishes the spin-coupling exchange interaction, and decreases the ferromagnetic-paramagnetic transition temperature values from 332 K for x = 0 to 163 K for x = 0.7. For Pr-rich manganites, due to the canted spin of magnetic Pr ions, the magnetizations are hardly saturated under low field and the saturated moment are larger than that of the La-rich manganites under high field. The curves taken from FC-ZFC measurement indicated that the magnetic order changes from a ferromagnetic long-range order with x = 0.0 to a spin-glass nature with x = 0.7. These of regular substitution are in good agreement with increasing the B value in Bloch's T3/2 law, M(T)=Ms(0)(1-BT3/2), decreasing the spin-wave stiffness parameter D in quadratic dispersion relation, Ek = Dk2 and reducing the exchange energy Ek, as well as resulting in the lower value of Tc.
| Original language | English |
|---|---|
| Title of host publication | INTERMAG Europe 2002 - IEEE International Magnetics Conference |
| Editors | J. Fidler, B. Hillebrands, C. Ross, D. Weller, L. Folks, E. Hill, M. Vazquez Villalabeitia, J. A. Bain, Jo De Boeck, R. Wood |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| ISBN (Electronic) | 0780373650, 9780780373655 |
| DOIs | |
| Publication status | Published - 2002 Jan 1 |
| Event | 2002 IEEE International Magnetics Conference, INTERMAG Europe 2002 - Amsterdam, Netherlands Duration: 2002 Apr 28 → 2002 May 2 |
Publication series
| Name | INTERMAG Europe 2002 - IEEE International Magnetics Conference |
|---|
Other
| Other | 2002 IEEE International Magnetics Conference, INTERMAG Europe 2002 |
|---|---|
| Country | Netherlands |
| City | Amsterdam |
| Period | 02-04-28 → 02-05-02 |
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All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering
- Surfaces, Coatings and Films
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Evolution of magnetic properties and canted spin behavior of the La0.7-xPrxPb0.3MnO3 manganite. / Horng, Lance; Young, S. L.
INTERMAG Europe 2002 - IEEE International Magnetics Conference. ed. / J. Fidler; B. Hillebrands; C. Ross; D. Weller; L. Folks; E. Hill; M. Vazquez Villalabeitia; J. A. Bain; Jo De Boeck; R. Wood. Institute of Electrical and Electronics Engineers Inc., 2002. 1001343 (INTERMAG Europe 2002 - IEEE International Magnetics Conference).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
TY - GEN
T1 - Evolution of magnetic properties and canted spin behavior of the La0.7-xPrxPb0.3MnO3 manganite
AU - Horng, Lance
AU - Young, S. L.
PY - 2002/1/1
Y1 - 2002/1/1
N2 - The colossal magnetoresistance (CMR) materials have attracted considerable attention recently. In this report, the results of detailed investigation of the structural and magnetic properties of the La0.7-xPrxPb0.3MnO3 (0 ≦ x ≦ 0.7) over a wide range of compositions are presented and compared with the consequences deduced from classical magnetic mechanism in this article. The regular replacement of smaller Pr ion in the La site causes structure change from rhombohedral symmetry with space group R3c to orthorhombic structure. Therefore, the introduction of praseodymium enhances the distortion of the perovskite, diminishes the spin-coupling exchange interaction, and decreases the ferromagnetic-paramagnetic transition temperature values from 332 K for x = 0 to 163 K for x = 0.7. For Pr-rich manganites, due to the canted spin of magnetic Pr ions, the magnetizations are hardly saturated under low field and the saturated moment are larger than that of the La-rich manganites under high field. The curves taken from FC-ZFC measurement indicated that the magnetic order changes from a ferromagnetic long-range order with x = 0.0 to a spin-glass nature with x = 0.7. These of regular substitution are in good agreement with increasing the B value in Bloch's T3/2 law, M(T)=Ms(0)(1-BT3/2), decreasing the spin-wave stiffness parameter D in quadratic dispersion relation, Ek = Dk2 and reducing the exchange energy Ek, as well as resulting in the lower value of Tc.
AB - The colossal magnetoresistance (CMR) materials have attracted considerable attention recently. In this report, the results of detailed investigation of the structural and magnetic properties of the La0.7-xPrxPb0.3MnO3 (0 ≦ x ≦ 0.7) over a wide range of compositions are presented and compared with the consequences deduced from classical magnetic mechanism in this article. The regular replacement of smaller Pr ion in the La site causes structure change from rhombohedral symmetry with space group R3c to orthorhombic structure. Therefore, the introduction of praseodymium enhances the distortion of the perovskite, diminishes the spin-coupling exchange interaction, and decreases the ferromagnetic-paramagnetic transition temperature values from 332 K for x = 0 to 163 K for x = 0.7. For Pr-rich manganites, due to the canted spin of magnetic Pr ions, the magnetizations are hardly saturated under low field and the saturated moment are larger than that of the La-rich manganites under high field. The curves taken from FC-ZFC measurement indicated that the magnetic order changes from a ferromagnetic long-range order with x = 0.0 to a spin-glass nature with x = 0.7. These of regular substitution are in good agreement with increasing the B value in Bloch's T3/2 law, M(T)=Ms(0)(1-BT3/2), decreasing the spin-wave stiffness parameter D in quadratic dispersion relation, Ek = Dk2 and reducing the exchange energy Ek, as well as resulting in the lower value of Tc.
UR - http://www.scopus.com/inward/record.url?scp=85017267678&partnerID=8YFLogxK
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U2 - 10.1109/INTMAG.2002.1001343
DO - 10.1109/INTMAG.2002.1001343
M3 - Conference contribution
AN - SCOPUS:85017267678
T3 - INTERMAG Europe 2002 - IEEE International Magnetics Conference
BT - INTERMAG Europe 2002 - IEEE International Magnetics Conference
A2 - Fidler, J.
A2 - Hillebrands, B.
A2 - Ross, C.
A2 - Weller, D.
A2 - Folks, L.
A2 - Hill, E.
A2 - Vazquez Villalabeitia, M.
A2 - Bain, J. A.
A2 - De Boeck, Jo
A2 - Wood, R.
PB - Institute of Electrical and Electronics Engineers Inc.
ER -