Zirconium as a Boron Sink in Crystalline CoFeB/MgO/CoFeB Magnetic Tunnel Junctions

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概要

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• ZrB2 and ZrB have been predicted to be the most thermodynamically stable of the transition metal borides. Here, we have investigated the use of a Zr layer to act as a boron ``getter'' during thermal annealing of structures which model a CoFeB/MgO magnetic tunnel junction. From magnetic and structural studies, a boron gettering effect is found when the Zr underlayer reaches a critical thickness, allowing CoFeB to crystallize in the required body-centered cubic structure with (001) orientation. Elemental depth profiling confirms that the majority of metallic boron in the structure is concentrated within a thermodynamically stable ZrBx compound underlayer after annealing.

• 2011-01-25

著者

• Marrows Christopher

  School Of Physics And Astronomy E.c. Stoner Laboratory University Of Leeds

• Brown Andrew

  Institute for Materials Research, University of Leeds, Leeds LS2 9JT, U.K.

• Walton Alex

  School of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, U.K.

• Hindmarch Aidan

  School of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, U.K.

• Harnchana Viyada

  Institute for Materials Research, University of Leeds, Leeds LS2 9JT, U.K.

• Brydson Rik

  Institute for Materials Research, University of Leeds, Leeds LS2 9JT, U.K.

関連論文

• Reduction of Threshold Current for Domain Wall Depinning Using Gd Doping of Permalloy
• Zirconium as a Boron Sink in Crystalline CoFeB/MgO/CoFeB Magnetic Tunnel Junctions

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