Evidence of Long-Range and Short-Range Magnetic Ordering in the Honeycomb Na3Mn2SbO6 Oxide

Dileep Kumar Yadav; Qiang Zhang; Krzysztof Gofryk; Harikrishnan S. Nair; Sitharaman Uma

doi:10.1021/acs.inorgchem.3c00666

Evidence of Long-Range and Short-Range Magnetic Ordering in the Honeycomb Na₃Mn₂SbO₆ Oxide

Dileep Kumar Yadav, Qiang Zhang, Krzysztof Gofryk, Harikrishnan S. Nair, Sitharaman Uma

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Abstract

We present a comprehensive study of the synthesis, structure, and magnetic properties of the honeycomb oxide Na₃Mn₂SbO₆ supported by neutron diffraction, heat capacity, and magnetization measurements. The refinements of the neutron diffraction patterns (150, 50, and 45 K) using the Rietveld method confirm the monoclinic (S. G. C2/m) structure. Temperature-dependent magnetic susceptibilities measured at varying fields along with the heat capacity measurements demonstrate the coexistence of long-range ordering (∼42 K) and short-range ordering (∼65 K). The field-dependent isothermal magnetization measurements at 5 K indicate a spin-flop transition around 5 T. Rietveld refinements of the low-temperature (below 45 K) neutron diffraction data further confirm the long-range magnetic ordering. In addition, the temperature variation of the lattice parameters obtained from the neutron powder diffraction analysis exhibited a distinct anomaly near the antiferromagnetic transition temperature. The appearance of the concomitant broadened backgrounds in the neutron powder diffraction data collected at 80, 50, and 45 K supports the short-range ordering. The resultant magnetic structure consists of spins that are aligned antiparallel with the nearest neighbors and also with the spins of the adjacent honeycomb layers. The occurrence of a fully ordered magnetic ground state (Neel antiferromagnetic (AFM)) in Na₃Mn₂SbO₆ consolidates the significance of fabricating new honeycomb oxides.

Original language	English
Pages (from-to)	7403-7412
Number of pages	10
Journal	Inorganic Chemistry
Volume	62
Issue number	19
DOIs	https://doi.org/10.1021/acs.inorgchem.3c00666
State	Published - May 15 2023

Funding

The authors are thankful for the financial support received from SERB (Govt. of India) under grant number CRG/2021/003714 and the Institute of Eminence grant (IoE/2021/12/FRP) University of Delhi. They also gratefully acknowledge Prof. R. Nagarajan, Department of Chemistry, University of Delhi, for constant support and discussion. D.K.Y. thanks CSIR, Govt. of India, for the senior research fellowship. K.G. acknowledges support from the Center for Thermal Energy Transport under Irradiation (TETI), an Energy Frontier Research Center funded by the U.S. Department of Energy (DOE) Office of Basic Energy Sciences.

Funders	Funder number
Center for Thermal Energy Transport
Institute of Eminence	IoE/2021/12/FRP
U.S. Department of Energy
Basic Energy Sciences
Council of Scientific and Industrial Research, India
Science and Engineering Research Board	CRG/2021/003714

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10.1021/acs.inorgchem.3c00666

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title = "Evidence of Long-Range and Short-Range Magnetic Ordering in the Honeycomb Na3Mn2SbO6 Oxide",

abstract = "We present a comprehensive study of the synthesis, structure, and magnetic properties of the honeycomb oxide Na3Mn2SbO6 supported by neutron diffraction, heat capacity, and magnetization measurements. The refinements of the neutron diffraction patterns (150, 50, and 45 K) using the Rietveld method confirm the monoclinic (S. G. C2/m) structure. Temperature-dependent magnetic susceptibilities measured at varying fields along with the heat capacity measurements demonstrate the coexistence of long-range ordering (∼42 K) and short-range ordering (∼65 K). The field-dependent isothermal magnetization measurements at 5 K indicate a spin-flop transition around 5 T. Rietveld refinements of the low-temperature (below 45 K) neutron diffraction data further confirm the long-range magnetic ordering. In addition, the temperature variation of the lattice parameters obtained from the neutron powder diffraction analysis exhibited a distinct anomaly near the antiferromagnetic transition temperature. The appearance of the concomitant broadened backgrounds in the neutron powder diffraction data collected at 80, 50, and 45 K supports the short-range ordering. The resultant magnetic structure consists of spins that are aligned antiparallel with the nearest neighbors and also with the spins of the adjacent honeycomb layers. The occurrence of a fully ordered magnetic ground state (Neel antiferromagnetic (AFM)) in Na3Mn2SbO6 consolidates the significance of fabricating new honeycomb oxides.",

author = "Yadav, {Dileep Kumar} and Qiang Zhang and Krzysztof Gofryk and Nair, {Harikrishnan S.} and Sitharaman Uma",

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AB - We present a comprehensive study of the synthesis, structure, and magnetic properties of the honeycomb oxide Na3Mn2SbO6 supported by neutron diffraction, heat capacity, and magnetization measurements. The refinements of the neutron diffraction patterns (150, 50, and 45 K) using the Rietveld method confirm the monoclinic (S. G. C2/m) structure. Temperature-dependent magnetic susceptibilities measured at varying fields along with the heat capacity measurements demonstrate the coexistence of long-range ordering (∼42 K) and short-range ordering (∼65 K). The field-dependent isothermal magnetization measurements at 5 K indicate a spin-flop transition around 5 T. Rietveld refinements of the low-temperature (below 45 K) neutron diffraction data further confirm the long-range magnetic ordering. In addition, the temperature variation of the lattice parameters obtained from the neutron powder diffraction analysis exhibited a distinct anomaly near the antiferromagnetic transition temperature. The appearance of the concomitant broadened backgrounds in the neutron powder diffraction data collected at 80, 50, and 45 K supports the short-range ordering. The resultant magnetic structure consists of spins that are aligned antiparallel with the nearest neighbors and also with the spins of the adjacent honeycomb layers. The occurrence of a fully ordered magnetic ground state (Neel antiferromagnetic (AFM)) in Na3Mn2SbO6 consolidates the significance of fabricating new honeycomb oxides.

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Evidence of Long-Range and Short-Range Magnetic Ordering in the Honeycomb Na₃Mn₂SbO₆ Oxide

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