Growth and characterization of large (Y,La)TiO3 and (Y,Ca)TiO3 single crystals

Hameed, S.; Joe, J.; Thoutam, L. R.; Garcia-Barriocanal, J.; Yu, B.; Yu, G.; Chi, S.; Hong, T.; Williams, T. J.; Freeland, J. W.; Gehring, P. M.; Xu, Z.; Matsuda, M.; Jalan, B.; Greven, M.

doi:10.1103/physrevmaterials.5.125003

Title: Growth and characterization of large ( Y , La ) TiO 3 and ( Y , Ca ) TiO 3 single crystals

Journal Article · Wed Dec 29 00:00:00 EST 2021 · Physical Review Materials

DOI:https://doi.org/10.1103/physrevmaterials.5.125003· OSTI ID:1854359

^[1]; Joe, J. ^[1]; Thoutam, L. R. ^[2]; Garcia-Barriocanal, J. ^[3]; Yu, B. ^[1]; Yu, G. ^[4];

^[5];

^[5]; Freeland, J. W. ^[6];

^[7]; Xu, Z. ^[8];

^[5]; Jalan, B. ^[1];

^[1]

Univ. of Minnesota, Minneapolis, MN (United States)
Univ. of Minnesota, Minneapolis, MN (United States); SR Univ., Warangal (India)
Univ. of Minnesota, Minneapolis, MN (United States). Characterization Facility
Univ. of Minnesota, Minneapolis, MN (United States). Characterization Facility; Univ. of Minnesota, Minneapolis, MN (United States). Informatics Inst.
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Argonne National Lab. (ANL), Argonne, IL (United States)
National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Center for Neutron Research
National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Center for Neutron Research; Univ. of Maryland, College Park, MD (United States)

The Mott-insulating rare-earth titanates ( $R {TiO}_{3}$ , with $R$ being a rare-earth ion) are an important class of materials that encompasses interesting spin-orbital phases as well as ferromagnet-antiferromagnet and insulator-metal transitions. The growth of these materials has been plagued by difficulties related to overoxidation, which arises from a strong tendency of ${Ti}^{3 +}$ to oxidize to ${Ti}^{4 +}$ . We describe our efforts to grow sizable single crystals of ${YTiO}_{3}, Y_{1 - x} {La}_{x} {TiO}_{3}$ ( $x \leq 0.25$ ), and $Y_{1 - y} {Ca}_{y} {TiO}_{3}$ ( $y \leq 0.35$ ) with the optical traveling-solvent floating-zone technique. Finally, we present sample characterization via chemical composition analysis, magnetometry, charge transport, neutron scattering, x-ray absorption spectroscopy, and x-ray magnetic circular dichroism to understand macroscopic physical property variations associated with overoxidation. Furthermore, we demonstrate a good signal-to-noise ratio in inelastic magnetic neutron scattering measurements of spin-wave excitations. A superconducting impurity phase, found to appear in Ca-doped samples at high doping levels, is identified as TiO.

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Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division; National Institute of Standards and Technology (NIST)

Grant/Contract Number:: AC02-06CH11357; AC05-00OR22725; SC0016371

OSTI ID:: 1854359

Alternate ID(s):: OSTI ID: 1837858

Journal Information:: Physical Review Materials, Vol. 5, Issue 12; ISSN 2475-9953

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Title: Growth and characterization of large ( Y , La ) TiO 3 and ( Y , Ca ) TiO 3 single crystals

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