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Title: Multiphase magnetism in Yb 2 Ti 2 O 7

Abstract

We use neutron scattering to show that ferromagnetism and antiferromagnetism coexist in the low T state of the pyrochlore quantum magnet Yb 2 Ti 2 O 7 . While magnetic Bragg peaks evidence long-range static ferromagnetic order, inelastic scattering shows that short-range correlated antiferromagnetism is also present. Small-angle neutron scattering provides direct evidence for mesoscale magnetic structure that we associate with metastable antiferromagnetism. Classical Monte Carlo simulations based on exchange interactions inferred from 111 -oriented high-field spin wave measurements confirm that antiferromagnetism is metastable within the otherwise ferromagnetic ground state. The apparent lack of coherent spin wave excitations and strong sensitivity to quenched disorder characterizing Yb 2 Ti 2 O 7 is a consequence of this multiphase magnetism.

Authors:
ORCiD logo; ; ; ORCiD logo; ORCiD logo; ; ; ; ; ORCiD logo
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); Gordon and Betty Moore Foundation; National Science Foundation (NSF)
OSTI Identifier:
1686214
Alternate Identifier(s):
OSTI ID: 1756278
Grant/Contract Number:  
AC05-00OR22725; SC0019331; GBMF-4532; DMR190020; DMR-1644779
Resource Type:
Published Article
Journal Name:
Proceedings of the National Academy of Sciences of the United States of America
Additional Journal Information:
Journal Name: Proceedings of the National Academy of Sciences of the United States of America Journal Volume: 117 Journal Issue: 44; Journal ID: ISSN 0027-8424
Publisher:
National Academy of Sciences
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; frustrated magnetism; neutron scattering; phase transitions; pyrochlore

Citation Formats

Scheie, Allen, Kindervater, Jonas, Zhang, Shu, Changlani, Hitesh J., Sala, Gabriele, Ehlers, Georg, Heinemann, Andre, Tucker, Gregory S., Koohpayeh, Seyed M., and Broholm, Collin. Multiphase magnetism in Yb 2 Ti 2 O 7. United States: N. p., 2020. Web. doi:10.1073/pnas.2008791117.
Scheie, Allen, Kindervater, Jonas, Zhang, Shu, Changlani, Hitesh J., Sala, Gabriele, Ehlers, Georg, Heinemann, Andre, Tucker, Gregory S., Koohpayeh, Seyed M., & Broholm, Collin. Multiphase magnetism in Yb 2 Ti 2 O 7. United States. https://doi.org/10.1073/pnas.2008791117
Scheie, Allen, Kindervater, Jonas, Zhang, Shu, Changlani, Hitesh J., Sala, Gabriele, Ehlers, Georg, Heinemann, Andre, Tucker, Gregory S., Koohpayeh, Seyed M., and Broholm, Collin. Fri . "Multiphase magnetism in Yb 2 Ti 2 O 7". United States. https://doi.org/10.1073/pnas.2008791117.
@article{osti_1686214,
title = {Multiphase magnetism in Yb 2 Ti 2 O 7},
author = {Scheie, Allen and Kindervater, Jonas and Zhang, Shu and Changlani, Hitesh J. and Sala, Gabriele and Ehlers, Georg and Heinemann, Andre and Tucker, Gregory S. and Koohpayeh, Seyed M. and Broholm, Collin},
abstractNote = {We use neutron scattering to show that ferromagnetism and antiferromagnetism coexist in the low T state of the pyrochlore quantum magnet Yb 2 Ti 2 O 7 . While magnetic Bragg peaks evidence long-range static ferromagnetic order, inelastic scattering shows that short-range correlated antiferromagnetism is also present. Small-angle neutron scattering provides direct evidence for mesoscale magnetic structure that we associate with metastable antiferromagnetism. Classical Monte Carlo simulations based on exchange interactions inferred from ⟨ 111 ⟩ -oriented high-field spin wave measurements confirm that antiferromagnetism is metastable within the otherwise ferromagnetic ground state. The apparent lack of coherent spin wave excitations and strong sensitivity to quenched disorder characterizing Yb 2 Ti 2 O 7 is a consequence of this multiphase magnetism.},
doi = {10.1073/pnas.2008791117},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
number = 44,
volume = 117,
place = {United States},
year = {Fri Oct 23 00:00:00 EDT 2020},
month = {Fri Oct 23 00:00:00 EDT 2020}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1073/pnas.2008791117

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