The effectiveness of nanoscale Dy 2 Fe 14 B thin films on coercivity and energy product of melt-spun ribbons of Nd 2 Fe 14 B at high temperatures was investigated. It is hypothesized that the nanoscale Dy-thin film will act as an obstacle for the nucleation of reverse domains and also maximize the energy of domain walls and thereby improve the magnetic performance at high temperatures. Pulsed laser deposition (PLD) of amorphous Dy 2 Fe 14 B layers on Nd 2 Fe 14 B melt-spun ribbons was performed for a nominal thickness of 40nm. The coated ribbons were then annealed in environmentally controlled quartz furnace at two different cycles (750°C for 15min and 900°C for 2h) to cause crystallization. Magnetic hysteresis tests conducted at 300 and 400K revealed that there is small but consistent improvement in the magnetic properties of the coated ribbons annealed at 750°C for 15min. However, higher temperature annealing (900°C for 2h) drastically reduced the magnetic properties. The incomplete recrystallization of amorphous structure at 750°C for 15min and large grain growth and formation of non-magnetic phases at 900°C for 2h are believed to be responsible for not meeting the expected magnetic performance.