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Dipolar-octupolar Ising Antiferromagnetism In Sm2ti2o7

Title: Dipolar-octupolar Ising Antiferromagnetism In Sm2ti2o7: A Moment Fragmentation Candidate.
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Name(s): Mauws, C., author
Hallas, A. M., author
Sala, G., author
Aczel, A. A., author
Sarte, P. M., author
Gaudet, J., author
Ziat, D., author
Quilliam, J. A., author
Lussier, J. A., author
Bieringer, M., author
Zhou, H. D., author
Wildes, A., author
Stone, I. M. B., author
Abernathy, D., author
Luke, G. M., author
Gaulin, B. D., author
Wiebe, C. R., author
Type of Resource: text
Genre: Journal Article
Text
Journal Article
Date Issued: 2018-09-05
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: Over the past two decades, the magnetic ground states of all rare-earth titanate pyrochlores have been extensively studied, with the exception of Sm2Ti2O7. This is, in large part, due to the very high absorption cross section of naturally occurring samarium, which renders neutron scattering infeasible. To combat this, we have grown a large, isotopically enriched single crystal of Sm2Ti2O7. Using inelastic neutron scattering, we determine that the crystal field ground state for Sm3+ is a dipolar-octupolar doublet with Ising anisotropy. Neutron diffraction experiments reveal that Sm2Ti2O7 orders into the all-in, all-out magnetic structure with an ordered moment of 0.44(7)mu(B) below T-N = 0.35 K, consistent with expectations for antiferromagnetically coupled Ising spins on the pyrochlore lattice. Zero-field muon spin relaxation measurements reveal an absence of spontaneous oscillations and persistent spin fluctuations down to 0.03 K. The combination of the dipolar-octupolar nature of the Sm3+ moment, the all-in, all-out ordered state, and the low-temperature persistent spin dynamics make this material an intriguing candidate for moment fragmentation physics.
Identifier: FSU_libsubv1_wos_000443672100001 (IID), 10.1103/PhysRevB.98.100401 (DOI)
Keywords: spin ice, ho2ti2o7
Publication Note: The publisher’s version of record is available at https://doi.org/10.1103/PhysRevB.98.100401
Persistent Link to This Record: http://purl.flvc.org/fsu/fd/FSU_libsubv1_wos_000443672100001
Owner Institution: FSU
Is Part Of: Physical Review B.
2469-9950
Issue: iss. 10, vol. 98

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Mauws, C., Hallas, A. M., Sala, G., Aczel, A. A., Sarte, P. M., Gaudet, J., … Wiebe, C. R. (2018). Dipolar-octupolar Ising Antiferromagnetism In Sm2ti2o7: A Moment Fragmentation Candidate. Physical Review B. Retrieved from http://purl.flvc.org/fsu/fd/FSU_libsubv1_wos_000443672100001