J.E. Greedan

Crystal structures and crystal chemistry of the RETiO3 perovskites: RE = La, Nd, Sm, Gd, Y

Abstract The structures of the RE TiO 3 perovskites, RE = La, Nd, Sm, Gd, and Y, were solved using single-crystal, automated diffractometer techniques. All were found to belong to space group Pbnm and are, therefore, isostructural with the RE FeO 3 perovskites. The structure of LaTiO 3 was solved using a crystal exhibiting a complex twinning. The RE O and TiO coordination polyhedra were studied as a function of the RE ion and were compared with those for RE FeO 3 . The major difference in results between RE TiO 3 and RE FeO 3 is a more highly distorted TiO octahedron for RE = Gd and Y.

Thermodynamic and single-ion properties of Tb 3¿ within the collective paramagnetic-spin liquid state of the frustrated pyrochlore antiferromagnet Tb2Ti2O7

In a recent letter [Phys. Rev. Lett. {\bf 82}, 1012 (1999)] it was found that the Tb

Oxygen-deficient SrTiO3−x, x = 0.28, 0.17, and 0.08. Crystal growth, crystal structure, magnetic, and transport properties

^{3+}

STATIC CRITICAL BEHAVIOR OF THE SPIN-FREEZING TRANSITION IN THE GEOMETRICALLY FRUSTRATED PYROCHLORE ANTIFERROMAGNET Y2MO2O7

magnetic moments in the Tb

Transition to long-range magnetic order in the highly frustrated insulating pyrochlore antiferromagnet Gd2Ti2O7

_2

Magnetic and electrical properties of R2Mo2O7 pyrochlore compounds

Ti

Structure and magnetism in Pr3ReO7 and Nd3ReO7—materials with an ordered, defect fluorite structure

_2

Crystal structure, short range and long range magnetic ordering in CuSb2O6

O

The crystal structure of the spin-glass pyrochlore, Y2Mo2O7

_7

Magnetic behavior in the series LaxY1−xTiO3

pyrochlore lattice of corner-sharing tetrahedra remain in a {\it collective paramagnetic} state down to 70mK. In this paper we present results from d.c. magnetic susceptibility, specific heat data, inelastic neutron scattering measurements, and crystal field calculations that strongly suggest that (1) the Tb