Effect of hole doping on the magnetic properties of the Mott-Hubbard antiferromagnetic insulator Nd{sub 1-x}TiO{sub 3}

Journal Article · Fri Sep 01 00:00:00 EDT 2006 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PHYSREVB.74.104418· OSTI ID:20853626

Sefat, Athena S; Greedan, John E; Cranswick, Lachlan ^[1]

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1. Brockhouse Institute for Materials Research and Department of Chemistry, McMaster University, Hamilton, Ontario, L8S 4M1 (Canada)

The magnetic properties of the hole(x) doped Mott-Hubbard, antiferromagnetic insulator, NdTiO{sub 3}, have been investigated in Nd{sub 1-x}TiO{sub 3}. For the materials in 0.010(6){<=}x{<=}0.112(4), a correlation between the structural and magnetic properties is discussed with respect to the Ti-O-Ti angles and the Ti-O bond distances. For 0.010(6){<=}x{<=}0.071(10), long-range magnetic order is observed through low-temperature neutron diffraction and heat capacity. Neel ordering temperatures of 88.2 and 61.9 K are determined, respectively, for x=0.019(6) and x=0.064(10). From high-resolution neutron diffraction, the Pnma magnetic structure is assigned, unambiguously, as G{sub x}C{sub y} on Ti{sup 3+} and C{sub y}{sup 2} on Nd{sup 3+}. The Ti{sup 3+} ordered moment decreases gradually from 0.45(8){mu}{sub B} for x=0.019(6) to 0.31(7){mu}{sub B} for x=0.071(10), but vanishes abruptly for higher x. Antiferromagnetic short-range order exists for 0.074(9){<=}x<0.098(10) as determined by neutron diffraction and the field dependence of the susceptibility. For 29(4)% hole doping in Nd{sub 1-x}TiO{sub 3}, x{>=}0.098(10), all magnetic ordering is destroyed.

• OSTI ID: 20853626
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Vol. 74, Issue 10; Other Information: DOI: 10.1103/PhysRevB.74.104418; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANTIFERROMAGNETIC MATERIALS
ANTIFERROMAGNETISM
BOND LENGTHS
CHEMICAL BONDS
CONCENTRATION RATIO
CORRELATIONS
DOPED MATERIALS
HOLES
MAGNETIC PROPERTIES
NEEL TEMPERATURE
NEODYMIUM COMPOUNDS
NEODYMIUM IONS
NEUTRON DIFFRACTION
ORTHORHOMBIC LATTICES
SPECIFIC HEAT
TITANATES
TITANIUM IONS