Multiphase Magnetism in Yb2Ti2O7
A. Scheie, J. Kindervater, S. Zhang, H.J. Changlani, G. Sala, G., Ehlers, A. Heinemann, G. S. Tucker, S.M. Koohpayeh, C. Broholm
TL;DR
This study reveals the coexistence of ferro- and antiferromagnetism in Yb2Ti2O7, demonstrating complex magnetic behavior through neutron scattering and simulations, and highlighting its proximity to an antiferromagnetic phase boundary.
Contribution
It provides detailed experimental and theoretical evidence of multiphase magnetism in Yb2Ti2O7, including the identification of a canted ferromagnetic ground state and metastable antiferromagnetic phases.
Findings
Coexistence of ferro- and antiferromagnetic states in Yb2Ti2O7
Identification of a canted ferromagnetic ground state
Yb2Ti2O7 is near an antiferromagnetic phase boundary
Abstract
We document the coexistence of ferro- and anti-ferromagnetism in pyrochlore using three neutron scattering techniques on stoichiometric crystals: elastic neutron scattering shows a canted ferromagnetic ground state, neutron scattering shows spin wave excitations from both a ferro-and an antiferro-magnetic state, and field and temperature dependent small angle neutron scattering reveals the corresponding anisotropic magnetic domain structure. High-field spin wave fits show that is extremely close to an antiferromagnetic phase boundary. Classical Monte Carlo simulations based on the interactions inferrred from high field spin wave measurements confirm antiferromagnetism is metastable within the FM ground state.
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