Schwinger-boson approach to anisotropy ferrimagnetic chain with bond alternation*
Li Yin-Xianga)†, Chen Binb)
       
The red, green, blue, black, and pink lines represent the specific heat of δ = 0, δ = 0.5, δ = 0.7, δ = 0.8, and δ = 0.9 respectively.