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Title: Structural, transport, and magnetic properties of the Nd{sub 1-x}A{sub x}TiO{sub 3} (A = Ca, Sr, Ba) system where 0 {le} x {le} 1

Abstract

A series of perovskite Nd{sub 1-x}A{sub x}TiO{sub 3} (A = Ca, Sr, Ba) compounds has been prepared by the dc-arc melting technique in the composition range 0 {le} x {le} {approximately} 1.0. The substitution of Sr and Ba in NdTiO{sub 3} results in structural phase transitions from orthorhombic (Pbnm) to cubic (Pm3m). The Nd{sub 1-x}Ca{sub x}TiO{sub 3} series remains orthorhombic throughout the range studied. Low field magnetic susceptibility measurements and remanent magnetic moment studies suggest that the Ti sublattice in the insulating Nd{sub 1-x} A{sub x}TiO{sub 3} compounds (0 {le} x {le} {approximately} 0.2) orders as canted antiferromagnets. The Nd{sub 1-x}A{sub x}TiO{sub 3} compounds show compositionally dependent metal-insulator transitions that coincide with the disappearance of the magnetic ordering. The correlations between the structure and transport properties are discussed in terms of the Ti-O-Ti angle and Ti-O bond distance. The perovskite tolerance factor, t, is also shown to be a useful parameter to sort insulating and metallic phases in these compounds.

Authors:
; ; ;  [1]
  1. Univ. of Maryland, College Park, MD (United States)
Publication Date:
OSTI Identifier:
552733
Resource Type:
Journal Article
Journal Name:
Journal of Solid State Chemistry
Additional Journal Information:
Journal Volume: 114; Journal Issue: 1; Other Information: PBD: Jan 1995
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; TITANIUM OXIDES; MAGNETIC PROPERTIES; PHASE DIAGRAMS; CALCIUM OXIDES; STRONTIUM OXIDES; BARIUM OXIDES; NEODYMIUM OXIDES; CHEMICAL PREPARATION; SAMPLE PREPARATION; ELECTRIC CONDUCTIVITY; MAGNETIC SUSCEPTIBILITY; PEROVSKITES

Citation Formats

Eylem, C, Eichhorn, B W, Ju, H L, and Greene, R L. Structural, transport, and magnetic properties of the Nd{sub 1-x}A{sub x}TiO{sub 3} (A = Ca, Sr, Ba) system where 0 {le} x {le} 1. United States: N. p., 1995. Web. doi:10.1006/jssc.1995.1024.
Eylem, C, Eichhorn, B W, Ju, H L, & Greene, R L. Structural, transport, and magnetic properties of the Nd{sub 1-x}A{sub x}TiO{sub 3} (A = Ca, Sr, Ba) system where 0 {le} x {le} 1. United States. doi:10.1006/jssc.1995.1024.
Eylem, C, Eichhorn, B W, Ju, H L, and Greene, R L. Sun . "Structural, transport, and magnetic properties of the Nd{sub 1-x}A{sub x}TiO{sub 3} (A = Ca, Sr, Ba) system where 0 {le} x {le} 1". United States. doi:10.1006/jssc.1995.1024.
@article{osti_552733,
title = {Structural, transport, and magnetic properties of the Nd{sub 1-x}A{sub x}TiO{sub 3} (A = Ca, Sr, Ba) system where 0 {le} x {le} 1},
author = {Eylem, C and Eichhorn, B W and Ju, H L and Greene, R L},
abstractNote = {A series of perovskite Nd{sub 1-x}A{sub x}TiO{sub 3} (A = Ca, Sr, Ba) compounds has been prepared by the dc-arc melting technique in the composition range 0 {le} x {le} {approximately} 1.0. The substitution of Sr and Ba in NdTiO{sub 3} results in structural phase transitions from orthorhombic (Pbnm) to cubic (Pm3m). The Nd{sub 1-x}Ca{sub x}TiO{sub 3} series remains orthorhombic throughout the range studied. Low field magnetic susceptibility measurements and remanent magnetic moment studies suggest that the Ti sublattice in the insulating Nd{sub 1-x} A{sub x}TiO{sub 3} compounds (0 {le} x {le} {approximately} 0.2) orders as canted antiferromagnets. The Nd{sub 1-x}A{sub x}TiO{sub 3} compounds show compositionally dependent metal-insulator transitions that coincide with the disappearance of the magnetic ordering. The correlations between the structure and transport properties are discussed in terms of the Ti-O-Ti angle and Ti-O bond distance. The perovskite tolerance factor, t, is also shown to be a useful parameter to sort insulating and metallic phases in these compounds.},
doi = {10.1006/jssc.1995.1024},
journal = {Journal of Solid State Chemistry},
number = 1,
volume = 114,
place = {United States},
year = {1995},
month = {1}
}