title: Phase diagram of a three-dimensional antiferromagnet with random magnetic anisotropy.
abstract: Three-dimensional antiferromagnets with random magnetic anisotropy (RMA) that have been experimentally studied to date have competing two-dimensional and three-dimensional exchange interactions which can obscure the authentic effects of RMA. The magnetic phase diagram of Fe_{x}Ni_{1-x}F_{2} epitaxial thin films with true random single-ion anisotropy was deduced from magnetometry and neutron scattering measurements and analyzed using mean-field theory. Regions with uniaxial, oblique, and easy-plane anisotropies were identified. A RMA-induced glass region was discovered where a Griffiths-like breakdown of long-range spin order occurs.
authors: Department of Physics and Astronomy, West Virginia University, Morgantown, West Virginia 26506-6315, USA.
authors: Felio A
authors: FA
authors: Perez
authors: Department of Physics and Astronomy, West Virginia University, Morgantown, West Virginia 26506-6315, USA.
authors: Pavel
authors: P
authors: Borisov
authors: Department of Physics and Astronomy, West Virginia University, Morgantown, West Virginia 26506-6315, USA.
authors: Trent A
authors: TA
authors: Johnson
authors: Department of Physics and Astronomy, West Virginia University, Morgantown, West Virginia 26506-6315, USA.
authors: Tudor D
authors: TD
authors: Stanescu
authors: Department of Physics and Astronomy, West Virginia University, Morgantown, West Virginia 26506-6315, USA.
authors: Robbyn
authors: R
authors: Trappen
authors: Department of Physics and Astronomy, West Virginia University, Morgantown, West Virginia 26506-6315, USA.
authors: Mikel B
authors: MB
authors: Holcomb
authors: Department of Physics and Astronomy, West Virginia University, Morgantown, West Virginia 26506-6315, USA.
authors: David
authors: D
authors: Lederman
authors: Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
authors: M R
authors: MR
authors: Fitzsimmons
authors: Quantum Condensed Matter Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
authors: Adam A
authors: AA
authors: Aczel
authors: Quantum Condensed Matter Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
authors: Tao
authors: T
authors: Hong