Electrical and magnetic properties of NdTiO3+delta

E Connolly; RJD Tilley; A Arulraj; R Gundakaram; CNR Rao

doi:10.1016/j.jallcom.2004.07.084

Electrical and magnetic properties of NdTiO3+delta

E Connolly, RJD Tilley, A Arulraj, R Gundakaram, CNR Rao

Electronic Instrumentation

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Abstract

The electrical and magnetic properties of NdTiO3+¿ have been measured and correlated with unit cell parameters and composition of the samples. NdTiO3+¿ exhibited the GdFeO3-type structure across the whole of the composition range, which in our investigations was found to extend approximately from NdTiO3.05 to NdTiO3.15. Over this range, the lattice contracted slightly, consistent with a rotation of the TiO6 octahedra in the a¿c plane. At compositions closest to NdTiO3.05, the materials were semiconducting and displayed a ferromagnetic transition at a temperature of about 90 K. At compositions above about NdTiO3.11, the materials were metallic and did not show any magnetic transitions. Several samples of composition close to NdTiO3.11 showed a metal¿insulator transition at typically 105 K. Electron microscopy revealed the presence of a microdomain texture in some samples, indicating that the results apply to an average structure rather than a genuine single phase. The results mirror those found for non-stoichiometric LaTiO3+¿ and can be explained in a similar fashion.

Original language	Undefined/Unknown
Pages (from-to)	153-157
Number of pages	5
Journal	Journal of Alloys and Compounds
Volume	388
Issue number	1
DOIs	https://doi.org/10.1016/j.jallcom.2004.07.084
Publication status	Published - 2004

Bibliographical note

ed. is niet bekend

Keywords

ZX CWTS JFIS < 1.00

Access to Document

10.1016/j.jallcom.2004.07.084

Cite this

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title = "Electrical and magnetic properties of NdTiO3+delta",

abstract = "The electrical and magnetic properties of NdTiO3+¿ have been measured and correlated with unit cell parameters and composition of the samples. NdTiO3+¿ exhibited the GdFeO3-type structure across the whole of the composition range, which in our investigations was found to extend approximately from NdTiO3.05 to NdTiO3.15. Over this range, the lattice contracted slightly, consistent with a rotation of the TiO6 octahedra in the a¿c plane. At compositions closest to NdTiO3.05, the materials were semiconducting and displayed a ferromagnetic transition at a temperature of about 90 K. At compositions above about NdTiO3.11, the materials were metallic and did not show any magnetic transitions. Several samples of composition close to NdTiO3.11 showed a metal¿insulator transition at typically 105 K. Electron microscopy revealed the presence of a microdomain texture in some samples, indicating that the results apply to an average structure rather than a genuine single phase. The results mirror those found for non-stoichiometric LaTiO3+¿ and can be explained in a similar fashion.",

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TY - JOUR

T1 - Electrical and magnetic properties of NdTiO3+delta

AU - Connolly, E

AU - Tilley, RJD

AU - Arulraj, A

AU - Gundakaram, R

AU - Rao, CNR

N1 - ed. is niet bekend

PY - 2004

Y1 - 2004

N2 - The electrical and magnetic properties of NdTiO3+¿ have been measured and correlated with unit cell parameters and composition of the samples. NdTiO3+¿ exhibited the GdFeO3-type structure across the whole of the composition range, which in our investigations was found to extend approximately from NdTiO3.05 to NdTiO3.15. Over this range, the lattice contracted slightly, consistent with a rotation of the TiO6 octahedra in the a¿c plane. At compositions closest to NdTiO3.05, the materials were semiconducting and displayed a ferromagnetic transition at a temperature of about 90 K. At compositions above about NdTiO3.11, the materials were metallic and did not show any magnetic transitions. Several samples of composition close to NdTiO3.11 showed a metal¿insulator transition at typically 105 K. Electron microscopy revealed the presence of a microdomain texture in some samples, indicating that the results apply to an average structure rather than a genuine single phase. The results mirror those found for non-stoichiometric LaTiO3+¿ and can be explained in a similar fashion.

AB - The electrical and magnetic properties of NdTiO3+¿ have been measured and correlated with unit cell parameters and composition of the samples. NdTiO3+¿ exhibited the GdFeO3-type structure across the whole of the composition range, which in our investigations was found to extend approximately from NdTiO3.05 to NdTiO3.15. Over this range, the lattice contracted slightly, consistent with a rotation of the TiO6 octahedra in the a¿c plane. At compositions closest to NdTiO3.05, the materials were semiconducting and displayed a ferromagnetic transition at a temperature of about 90 K. At compositions above about NdTiO3.11, the materials were metallic and did not show any magnetic transitions. Several samples of composition close to NdTiO3.11 showed a metal¿insulator transition at typically 105 K. Electron microscopy revealed the presence of a microdomain texture in some samples, indicating that the results apply to an average structure rather than a genuine single phase. The results mirror those found for non-stoichiometric LaTiO3+¿ and can be explained in a similar fashion.

KW - ZX CWTS JFIS < 1.00

U2 - 10.1016/j.jallcom.2004.07.084

DO - 10.1016/j.jallcom.2004.07.084

M3 - Article

SN - 0925-8388

VL - 388

SP - 153

EP - 157

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

IS - 1

ER -