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Broad research effort has been underway to study Antiferromagnetic (AFM) low-dimensional materials, However, The inherent mechanism of thermal properties of low dimensional magnetic nanomaterials is still puzzling.This paper mainly report the different properties between the surface and interface under small size and the bulk.Based on the BOLS correlation mechanism, We build an analytic and simple model for the size and interface coupling effects on the thermal stability of AFM nanocrystals model to explore magnetic material interface coupling effect under epitaxial growth and surface effect.