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26 April 2024 |
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A case study of bilayered spin-$1/2$ square lattice compound [VO(HCOO)$_2cdot$(H$_2$O)] | | S. Guchhait
; U. Arjun
; P. K. Anjana
; M. Sahoo
; A. Thirumurugan
; A. Madhi
; Y. Skourski
; B. Koo
; J. Sichelschmidt
; B. Schmidt
; M. Baenitz
; R. Nath
; | | Date: |
16 Aug 2019 | | Abstract: | We present the synthesis and a detail investigation of structural and
magnetic properties of polycrystalline [VO(HCOO)$_2cdot$(H$_2$O)] by means of
x-ray diffraction, magnetic susceptibility, high-field magnetization, heat
capacity, and electron spin resonance measurements. It crystallizes in a
orthorhombic structure with space group $Pcca$. It features distorted VO$_6$
octahedra connected via HCOO linker (formate anions) forming a two-dimensional
square lattice network with a bilayered structure. Analysis of magnetic
susceptibility, high field magnetization, and heat capacity data in terms of
the frustrated square lattice model unambiguously establish
quasi-two-dimensional nature of the compound with nearest neighbour interaction
$J_1/k_{
m B} simeq 11.7$~K and next-nearest-neighbour interaction
$J_2/k_{
m B} simeq 0.02$~K. It undergoes a N’eel antiferromagnetic ordering
at $T_{
m N} simeq 1.1$~K. The ratio $ heta_{
m CW}/T_{
m N} simeq 10.9$
reflects excellent two-dimensionality of the spin-lattice in the compound. A
strong in-plane anisotropy is inferred from the linear increase of $T_{
m N}$
with magnetic field, consistent with the structural data. | | Source: | arXiv, 1908.6032 | | Services: | Forum | Review | PDF | Favorites | |
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