Cr(110) texture induced by epitaxy on Al2O3 (0001) substrates: Preferential grain growth in the ⟨001⟩ direction

Boekelheide, Zoe; Hellman, F.

doi:10.1063/1.4801083

Cr(110) texture induced by epitaxy on Al₂O₃ (0001) substrates: Preferential grain growth in the ⟨001⟩ direction

Journal Article · Mon Apr 08 00:00:00 EDT 2013 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4801083· OSTI ID:1511359

Boekelheide, Zoe ^[1]; Hellman, F. ^[2]

National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States); Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Chromium exhibits (110) textured growth on Al₂O₃(0001) substrates induced by epitaxy. Epitaxy occurs in nine distinct orientations, leading to a polycrystalline film of grains with (110) out-of-plane orientation but different in-plane orientations. For e-beam evaporated films, scanning electron microscopy shows acicular Cr grains elongated in the 001 direction. Grain boundaries occur along (110) and (110) planes, which is explained by the low surface energy of {110} planes in the bcc structure. The direction of the long axes of the grains relative to the substrate is defined by the underlying hexagonal symmetry of the substrate, leading to a unique tri-directional microstructure.

Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22), Materials Sciences & Engineering Division (SC-22.2)

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1511359

Journal Information:: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 14 Vol. 102; ISSN 0003-6951

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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