Journal
APPLIED PHYSICS EXPRESS
Volume 4, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1143/APEX.4.013002
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Funding
- Engineering and Physical Sciences Research Council (EPSRC)
- Thai government
- Leeds EPSRC Nanoscience and Nanotechnology Facility (LENNF)
- EPSRC [EP/E016413/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/E016413/1] Funding Source: researchfish
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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. (C) 2011 The Japan Society of Applied Physics
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