Flux Growth of Cerium Nickel Gallides Studied by in Situ Neutron Diffraction

Jo W. Haddock; Zach J. Barton; Keke Feng; Ryan E. Baumbach; Qiang Zhang; Susan E. Latturner

doi:10.1021/acs.inorgchem.2c02588

Flux Growth of Cerium Nickel Gallides Studied by in Situ Neutron Diffraction

Jo W. Haddock, Zach J. Barton, Keke Feng, Ryan E. Baumbach, Qiang Zhang, Susan E. Latturner

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Abstract

Reactions of cerium and nickel in excess molten gallium were monitored by neutron diffraction during heating and cooling. The formation of binary intermediates CeGa₂and Ni₂Ga₃was observed during heating. During cooling of the molten mixture from 900 °C, precipitation of BaAl₄-type CeNi_0.74Ga_3.26occurred at 850 °C. Upon cooling to 650 °C, this compound reacted in the flux to form Ce₂NiGa₁₀and then Ce₂NiGa₁₂, the latter of which persisted to room temperature. Making use of this information, subsequent reactions were quenched at 750 °C to isolate crystals of CeNi_0.74Ga_3.26for further study. Similar reactions replacing Ce with La and quenching above 750 °C yielded LaNi_0.35Ga_3.65crystals. Magnetic susceptibility studies on CeNi_0.74Ga_3.26indicate that the cerium is trivalent; the Ce³⁺moments undergo a strongly anisotropic ferromagnetic ordering with moment perpendicular to the c axis below 7 K. Heat capacity data show little evidence of heavy fermion behavior. Resistivity measurements show that both LaNi_0.35Ga_3.65and CeNi_0.74Ga_3.26exhibit metallic behavior. Density of states calculations support this and indicate that Ni/Ga mixing in the compound stabilizes the structure.

Original language	English
Pages (from-to)	15645-15653
Number of pages	9
Journal	Inorganic Chemistry
Volume	61
Issue number	39
DOIs	https://doi.org/10.1021/acs.inorgchem.2c02588
State	Published - Oct 3 2022

Funding

This research was supported by the Division of Materials Research of the National Science Foundation (DMR-18-08471 and DMR-21-26077). This work utilized the resources of the X-ray Characterization Center in the Department of Chemistry and Biochemistry at FSU (FSU075000XRAY). The scanning electron microscope equipment in the Biological Sciences Imaging Resource (BSIR) of the Florida State University Department of Biology was also used; we thank Dr. Eric Lochner for guidance with this instrument. Part of this work was performed at the National High Magnetic Field Laboratory (NHMFL), which is supported by National Science Foundation Cooperative Agreement DMR-1644779, the State of Florida, and the Department of Energy. A portion of this research used resources at the Spallation Neutron Source, a DOE Office of Science User Facility operated by Oak Ridge National Laboratory.

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title = "Flux Growth of Cerium Nickel Gallides Studied by in Situ Neutron Diffraction",

abstract = "Reactions of cerium and nickel in excess molten gallium were monitored by neutron diffraction during heating and cooling. The formation of binary intermediates CeGa2and Ni2Ga3was observed during heating. During cooling of the molten mixture from 900 °C, precipitation of BaAl4-type CeNi0.74Ga3.26occurred at 850 °C. Upon cooling to 650 °C, this compound reacted in the flux to form Ce2NiGa10and then Ce2NiGa12, the latter of which persisted to room temperature. Making use of this information, subsequent reactions were quenched at 750 °C to isolate crystals of CeNi0.74Ga3.26for further study. Similar reactions replacing Ce with La and quenching above 750 °C yielded LaNi0.35Ga3.65crystals. Magnetic susceptibility studies on CeNi0.74Ga3.26indicate that the cerium is trivalent; the Ce3+moments undergo a strongly anisotropic ferromagnetic ordering with moment perpendicular to the c axis below 7 K. Heat capacity data show little evidence of heavy fermion behavior. Resistivity measurements show that both LaNi0.35Ga3.65and CeNi0.74Ga3.26exhibit metallic behavior. Density of states calculations support this and indicate that Ni/Ga mixing in the compound stabilizes the structure.",

author = "Haddock, \{Jo W.\} and Barton, \{Zach J.\} and Keke Feng and Baumbach, \{Ryan E.\} and Qiang Zhang and Latturner, \{Susan E.\}",

year = "2022",

month = oct,

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doi = "10.1021/acs.inorgchem.2c02588",

language = "English",

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journal = "Inorganic Chemistry",

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T1 - Flux Growth of Cerium Nickel Gallides Studied by in Situ Neutron Diffraction

AU - Haddock, Jo W.

AU - Barton, Zach J.

AU - Feng, Keke

AU - Baumbach, Ryan E.

AU - Zhang, Qiang

AU - Latturner, Susan E.

PY - 2022/10/3

Y1 - 2022/10/3

N2 - Reactions of cerium and nickel in excess molten gallium were monitored by neutron diffraction during heating and cooling. The formation of binary intermediates CeGa2and Ni2Ga3was observed during heating. During cooling of the molten mixture from 900 °C, precipitation of BaAl4-type CeNi0.74Ga3.26occurred at 850 °C. Upon cooling to 650 °C, this compound reacted in the flux to form Ce2NiGa10and then Ce2NiGa12, the latter of which persisted to room temperature. Making use of this information, subsequent reactions were quenched at 750 °C to isolate crystals of CeNi0.74Ga3.26for further study. Similar reactions replacing Ce with La and quenching above 750 °C yielded LaNi0.35Ga3.65crystals. Magnetic susceptibility studies on CeNi0.74Ga3.26indicate that the cerium is trivalent; the Ce3+moments undergo a strongly anisotropic ferromagnetic ordering with moment perpendicular to the c axis below 7 K. Heat capacity data show little evidence of heavy fermion behavior. Resistivity measurements show that both LaNi0.35Ga3.65and CeNi0.74Ga3.26exhibit metallic behavior. Density of states calculations support this and indicate that Ni/Ga mixing in the compound stabilizes the structure.

AB - Reactions of cerium and nickel in excess molten gallium were monitored by neutron diffraction during heating and cooling. The formation of binary intermediates CeGa2and Ni2Ga3was observed during heating. During cooling of the molten mixture from 900 °C, precipitation of BaAl4-type CeNi0.74Ga3.26occurred at 850 °C. Upon cooling to 650 °C, this compound reacted in the flux to form Ce2NiGa10and then Ce2NiGa12, the latter of which persisted to room temperature. Making use of this information, subsequent reactions were quenched at 750 °C to isolate crystals of CeNi0.74Ga3.26for further study. Similar reactions replacing Ce with La and quenching above 750 °C yielded LaNi0.35Ga3.65crystals. Magnetic susceptibility studies on CeNi0.74Ga3.26indicate that the cerium is trivalent; the Ce3+moments undergo a strongly anisotropic ferromagnetic ordering with moment perpendicular to the c axis below 7 K. Heat capacity data show little evidence of heavy fermion behavior. Resistivity measurements show that both LaNi0.35Ga3.65and CeNi0.74Ga3.26exhibit metallic behavior. Density of states calculations support this and indicate that Ni/Ga mixing in the compound stabilizes the structure.

UR - https://www.scopus.com/pages/publications/85138788372

U2 - 10.1021/acs.inorgchem.2c02588

DO - 10.1021/acs.inorgchem.2c02588

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C2 - 36121353

AN - SCOPUS:85138788372

SN - 0020-1669

VL - 61

SP - 15645

EP - 15653

JO - Inorganic Chemistry

JF - Inorganic Chemistry

IS - 39

ER -

Flux Growth of Cerium Nickel Gallides Studied by in Situ Neutron Diffraction

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