摘要
Pyrolysis of ferrocene over Pt coated SiO 2 substrate produces L1 o FePt encapsulated carbon nanotubes with enhanced magnetic coercivity at room temperarure. The underlying mechanism involves spin pinning by domain boundaries and encapsulation induced lattice distortion along [001] crystallographic plane; the latter is rarely seen and is supported by ab initio calculation. Carbon encapsulation of L1 o FePt is achieved through S–C mechanism and only takes place at specific location in pyrolytic furnace.