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Structural and magnetic investigations of single-crystalline neodymium zirconate pyrochlore Nd2Zr2O7
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Ciomaga Hatnean, Monica, Lees, Martin R., Petrenko, Oleg, Keeble, Dean Samuel, Balakrishnan, G., Gutmann, M. J., Klekovkina, V. V. and Malkin, B. Z. (2015) Structural and magnetic investigations of single-crystalline neodymium zirconate pyrochlore Nd2Zr2O7. Physical Review B (Condensed Matter and Materials Physics), 91 (17). 174416. doi:10.1103/PhysRevB.91.174416
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Official URL: http://dx.doi.org/10.1103/PhysRevB.91.174416
Abstract
We report structural and magnetic properties studies of large high-quality single crystals of the frustrated magnet Nd2Zr2O7. Powder x-ray diffraction analysis confirms that Nd2Zr2O7 adopts the pyrochlore structure. Room-temperature x-ray diffraction and time-of-flight neutron-scattering experiments show that the crystals are stoichiometric in composition with no measurable site disorder. The temperature dependence of the magnetic susceptibility shows no magnetic ordering at temperatures down to 0.5 K. Fits to the magnetic susceptibility data using a Curie-Weiss law reveal a ferromagnetic coupling between the Nd moments. Magnetization versus field measurements show a local Ising anisotropy along the <111> axes of the Nd3+ ions in the ground state. Specific heat versus temperature measurements in zero applied magnetic field indicate the presence of a thermal anomaly below T ~ 7 K, but no evidence of magnetic ordering is observed down to 0.5 K. The experimental temperature dependence of the single-crystal bulk dc susceptibility and isothermal magnetization are analyzed using crystal field theory and the crystal field parameters and exchange coupling constants determined.
| Item Type: | Journal Article | ||||||
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| Subjects: | Q Science > QC Physics Q Science > QD Chemistry |
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| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||
| Library of Congress Subject Headings (LCSH): | Zirconates, Zirconates--Magnetic properties, X-rays--Diffraction--Analysis | ||||||
| Journal or Publication Title: | Physical Review B (Condensed Matter and Materials Physics) | ||||||
| Publisher: | American Physical Society | ||||||
| ISSN: | 1098-0121 | ||||||
| Official Date: | 14 May 2015 | ||||||
| Dates: |
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| Volume: | 91 | ||||||
| Number: | 17 | ||||||
| Article Number: | 174416 | ||||||
| DOI: | 10.1103/PhysRevB.91.174416 | ||||||
| Status: | Peer Reviewed | ||||||
| Publication Status: | Published | ||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||
| Funder: | Engineering and Physical Sciences Research Council (EPSRC), Rossiĭskiĭ fond fundamentalʹnykh issledovaniĭ [Russian Foundation for Basic Research] (RFBR) | ||||||
| Grant number: | N14-02-00826(RFBR) |
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