Theoretical analysis on lead halides content dependences of defect structures and spin Hamiltonian parameters in lead halo borate glass composites with V2O5 dopants

•SHPs and defect structures for V4+ in PXPB composites are studied for distinct x.•Concentration variations of SHPs are reproduced with those of relevant quantities.•Mechanisms of Fourier type concentration functions of N, ρ, κ and H are analyzed.•This study can help to explore novel PXPB glasses tuned with PbX2 concentrations.