Synthesis, crystal growth, structural and magnetic characterization of NH4MCl2(HCOO), M=(Fe, Co, Ni)

Joshua T. Greenfield; V. Ovidiu Garlea; Saeed Kamali; Michael Chen; Kirill Kovnir

doi:10.1016/j.jssc.2015.09.016

Synthesis, crystal growth, structural and magnetic characterization of NH₄MCl₂(HCOO), M=(Fe, Co, Ni)

Joshua T. Greenfield, V. Ovidiu Garlea, Saeed Kamali, Michael Chen, Kirill Kovnir

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

An ambient-pressure solution route and an improved solvothermal synthetic method have been developed to produce polycrystalline powders and large single crystals of NH₄MCl₂(HCOO) (M=Fe, Co, Ni). The magnetic structure of the 1D linear chain compound NH₄FeCl₂(HCOO) has been determined by low-temperature neutron powder diffraction, revealing ferromagnetic intra-chain interactions and antiferromagnetic inter-chain interactions. The newly-reported Co and Ni analogs are isostructural with NH₄FeCl₂(HCOO), but there are significant differences in the magnetic properties of each compound; the Ni analog behaves similarly to the Fe compound but with stronger magnetic coupling, exhibiting antiferromagnetic ordering (T_N=8.5 K) and a broad metamagnetic transition between 2 and 5 T, while the Co analog does not order magnetically above 2 K, despite strong antiferromagnetic nearest-neighbor interactions.

Original language	English
Pages (from-to)	222-229
Number of pages	8
Journal	Journal of Solid State Chemistry
Volume	236
DOIs	https://doi.org/10.1016/j.jssc.2015.09.016
State	Published - Apr 1 2016

Funding

The University of California, Davis is gratefully acknowledged for financial support. The work at the Oak Ridge National Laboratory was sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy (DOE).

Keywords

Crystal growth
Low-dimensional magnetism
Magnetic structure
Mössbauer spectroscopy
Neutron diffraction
Solvothermal synthesis

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10.1016/j.jssc.2015.09.016

Cite this

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title = "Synthesis, crystal growth, structural and magnetic characterization of NH4MCl2(HCOO), M=(Fe, Co, Ni)",

abstract = "An ambient-pressure solution route and an improved solvothermal synthetic method have been developed to produce polycrystalline powders and large single crystals of NH4MCl2(HCOO) (M=Fe, Co, Ni). The magnetic structure of the 1D linear chain compound NH4FeCl2(HCOO) has been determined by low-temperature neutron powder diffraction, revealing ferromagnetic intra-chain interactions and antiferromagnetic inter-chain interactions. The newly-reported Co and Ni analogs are isostructural with NH4FeCl2(HCOO), but there are significant differences in the magnetic properties of each compound; the Ni analog behaves similarly to the Fe compound but with stronger magnetic coupling, exhibiting antiferromagnetic ordering (TN=8.5 K) and a broad metamagnetic transition between 2 and 5 T, while the Co analog does not order magnetically above 2 K, despite strong antiferromagnetic nearest-neighbor interactions.",

keywords = "Crystal growth, Low-dimensional magnetism, Magnetic structure, M{\"o}ssbauer spectroscopy, Neutron diffraction, Solvothermal synthesis",

author = "Greenfield, {Joshua T.} and {Ovidiu Garlea}, V. and Saeed Kamali and Michael Chen and Kirill Kovnir",

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T1 - Synthesis, crystal growth, structural and magnetic characterization of NH4MCl2(HCOO), M=(Fe, Co, Ni)

AU - Greenfield, Joshua T.

AU - Ovidiu Garlea, V.

AU - Kamali, Saeed

AU - Chen, Michael

AU - Kovnir, Kirill

PY - 2016/4/1

Y1 - 2016/4/1

N2 - An ambient-pressure solution route and an improved solvothermal synthetic method have been developed to produce polycrystalline powders and large single crystals of NH4MCl2(HCOO) (M=Fe, Co, Ni). The magnetic structure of the 1D linear chain compound NH4FeCl2(HCOO) has been determined by low-temperature neutron powder diffraction, revealing ferromagnetic intra-chain interactions and antiferromagnetic inter-chain interactions. The newly-reported Co and Ni analogs are isostructural with NH4FeCl2(HCOO), but there are significant differences in the magnetic properties of each compound; the Ni analog behaves similarly to the Fe compound but with stronger magnetic coupling, exhibiting antiferromagnetic ordering (TN=8.5 K) and a broad metamagnetic transition between 2 and 5 T, while the Co analog does not order magnetically above 2 K, despite strong antiferromagnetic nearest-neighbor interactions.

AB - An ambient-pressure solution route and an improved solvothermal synthetic method have been developed to produce polycrystalline powders and large single crystals of NH4MCl2(HCOO) (M=Fe, Co, Ni). The magnetic structure of the 1D linear chain compound NH4FeCl2(HCOO) has been determined by low-temperature neutron powder diffraction, revealing ferromagnetic intra-chain interactions and antiferromagnetic inter-chain interactions. The newly-reported Co and Ni analogs are isostructural with NH4FeCl2(HCOO), but there are significant differences in the magnetic properties of each compound; the Ni analog behaves similarly to the Fe compound but with stronger magnetic coupling, exhibiting antiferromagnetic ordering (TN=8.5 K) and a broad metamagnetic transition between 2 and 5 T, while the Co analog does not order magnetically above 2 K, despite strong antiferromagnetic nearest-neighbor interactions.

KW - Crystal growth

KW - Low-dimensional magnetism

KW - Magnetic structure

KW - Mössbauer spectroscopy

KW - Neutron diffraction

KW - Solvothermal synthesis

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