Multiphase Magnetism in Yb2Ti2O7
| Autor: | Andre Heinemann, Collin Broholm, J. Kindervater, Georg Ehlers, Allen Scheie, Hitesh J. Changlani, G. S. Tucker, Seyed Koohpayeh, Gabriele Sala, Shu Zhang |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
pyrochlore
Multidisciplinary Materials science Magnetic structure Condensed matter physics Strongly Correlated Electrons (cond-mat.str-el) Magnetism neutron scattering frustrated magnetism FOS: Physical sciences Inelastic scattering Neutron scattering neutron-scattering phase transitions Condensed Matter::Materials Science Condensed Matter - Strongly Correlated Electrons Ferromagnetism Spin wave Commentaries Physical Sciences Antiferromagnetism Condensed Matter::Strongly Correlated Electrons Ground state |
| Zdroj: | Proc Natl Acad Sci U S A Scheie, A.; Kindervater, J.; Zhang, S.; Changlani, H.; Sala, G.; Ehlers, G.; Heinemann, A.; Tucker, G.; Koohpayeh, S.; Broholm, C.: Multiphase magnetism in Yb2Ti2O7. In: Proceedings of the National Academy of Sciences of the United States of America: PNAS. Vol. 117 (2020) 44, 27245-27254. (DOI: /10.1073/pnas.2008791117) |
| ISSN: | 0027-8424 |
| Popis: | We document the coexistence of ferro- and anti-ferromagnetism in pyrochlore $\rm Yb_2Ti_2O_7$ 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 $\langle 111 \rangle$ spin wave fits show that $\rm Yb_2Ti_2O_7$ is extremely close to an antiferromagnetic phase boundary. Classical Monte Carlo simulations based on the interactions inferrred from high field spin wave measurements confirm $\psi_2$ antiferromagnetism is metastable within the FM ground state. Comment: 11 pages and 11 figures, 8 pages appendices with 10 additional figures |
| Databáze: | OpenAIRE |
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