Single-ion anisotropy in the gadolinium pyrochlores studied by electron paramagnetic resonance

2005/07/18 by V. N. Glazkov, M. E. Zhitomirsky, A. I. Smirnov +7 · 2 citations
Earth and Planetary Sciences · Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #High-pressure geophysics and materials #Nuclear materials and radiation effects #cond-mat.str-el

paper · pdf · doi:10.1103/physrevb.72.020409

published as Phys. Rev. B 72, 020409(R) (2005) · 5 pages, accepted to PRB

arxiv created 2005/07/18 · openalex publication_date 2005/07/25 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

The electron paramagnetic resonance is used to measure the single-ion anisotropy of Gd³⁺ ions in the pyrochlore structure of (Y_1\ensuremath-xGd_x)₂Ti₂O₇. A rather strong easy-plane-type anisotropy is found. The anisotropy constant D is comparable to the exchange integral J in the prototype Gd₂Ti₂O₇, D\ensuremath≃0.75J, and exceeds the dipolar energy scale. Physical implications of an easy-plane anisotropy for a pyrochlore antiferromagnet are considered. We calculate the magnetization curves at T=0 and discuss phase transitions in a magnetic field.

Cited by

• Theoretical investigations of tetrameric magnetic molecules for sub-kelvin cooling
• Suppression of the valence transition in solution-grown single crystals of Eu₂Pt₆Al₁₅

Related

• Magnetocaloric effect in pyrochlore antiferromagnetGd2Ti2O7
• Valence bond crystal in a pyrochlore antiferromagnet with orbital degeneracy
• Ising versus XY anisotropy in frustrated R₂Ti₂O₇ compounds as seen by polarized neutrons
• Valence-Bond Crystal, and Lattice Distortions in a Pyrochlore Antiferromagnet with Orbital Degeneracy
• S = 1 pyrochlore magnets with competing anisotropies: A tale of two Coulomb phases, Z₂ flux confinement and XY-like transitions