Case study of bilayered spin-1/2 square lattice compound VO(HCOO)2 • (H2O)

被引：6

作者：

Guchhait, S. ^{[1
]}

Arjun, U. ^{[1
]}

Anjana, P. K. ^{[2
]}

Sahoo, M. ^{[3
]}

Thirumurugan, A. ^{[2
]}

Medhi, A. ^{[1
]}

Skourski, Y. ^{[4
]}

Koo, B. ^{[5
]}

Sichelschmidt, J. ^{[5
]}

Schmidt, B. ^{[5
]}

Baenitz, M. ^{[5
]}

Nath, R. ^{[1
]}

机构：

[1] Indian Inst Sci Educ & Res Thiruvananthapuram, Sch Phys, Thiruvananthapuram 695551, Kerala, India

[2] Indian Inst Sci Educ & Res Thiruvananthapuram, Sch Chem, Thiruvananthapuram 695551, Kerala, India

[3] Univ Kerala, Dept Phys, Thiruvananthapuram 695581, Kerala, India

[4] Helmholtz Zentrum Dresden Rossendorf, Dresden High Magnet Field Lab HLD EMFL, D-01328 Dresden, Germany

[5] Max Planck Inst Chem Phys Solids, Nthnitzer Str 40, D-01187 Dresden, Germany

来源：

PHYSICAL REVIEW MATERIALS | 2019年 / 3卷 / 10期

关键词：

HEISENBERG-ANTIFERROMAGNET; MAGNETIC-PROPERTIES; TEMPERATURE; SUPERCONDUCTIVITY; FERROMAGNETISM; FRUSTRATION; PARAMETERS; EXCHANGE; STATE;

D O I：

10.1103/PhysRevMaterials.3.104409

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present the synthesis and a detailed investigation of structural and magnetic properties of polycrystalline VO(HCOO)(2) center dot (H2O) by means of x-ray diffraction, magnetic susceptibility, high-field magnetization, heat capacity, and electron-spin-resonance measurements. The compound crystallizes in an orthorhombic structure with space group Pcca. The crystal lattice features distorted VO6 octahedra connected via HCOO linkers (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 the quasi-two-dimensional nature of the compound with nearest-neighbor interaction J(1)/k(B) similar or equal to 11.7 K and next-nearest-neighbor interaction J(2)/k(B) similar or equal to 0.02 K. A Neel antiferromagnetic ordering sets in at T-N similar or equal to 1.1 K. The ratio theta(CW)/T-N similar or equal to 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-N with magnetic field, consistent with the structural data.

引用

页数：8

共 54 条

[1] CRYSTAL AND MAGNETIC STRUCTURE OF CUPRIC FLUORIDE DIHYDRATE AT 4.2 DEGREES K [J].