Heteroepitaxial growth and surface structure of L10-MnGa(111) ultra-thin films on GaN(0001)

Mandru, Andrada-Oana; Garcia Diaz, Reyes; Wang, Kangkang; Cooper, Kevin; Haider, Muhammad; Ingram, David C.; Takeuchi, Noboru; Smith, Arthur R.

doi:10.1063/1.4826203

Title: Heteroepitaxial growth and surface structure of L1₀-MnGa(111) ultra-thin films on GaN(0001)

Journal Article · Fri Oct 18 00:00:00 EDT 2013 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4826203· OSTI ID:1633194

^[1]; Garcia Diaz, Reyes ^[2]; Wang, Kangkang ^[3]; Cooper, Kevin ^[1]; Haider, Muhammad ^[4]; Ingram, David C. ^[1]; Takeuchi, Noboru ^[5];

^[1]

Ohio Univ., Athens, OH (United States). Nanoscale and Quantum Phenomena Inst.
Ohio Univ., Athens, OH (United States). Nanoscale and Quantum Phenomena Inst.; Meritorious Autonomous Univ. of Puebla (Mexico)
Ohio Univ., Athens, OH (United States). Nanoscale and Quantum Phenomena Inst.; Seagate Technology, Fremont, CA (United States)
Ohio Univ., Athens, OH (United States). Nanoscale and Quantum Phenomena Inst.; King Fahd Univ. of Petroleum and Minerals, Dhahran (Saudi Arabia)
Ohio Univ., Athens, OH (United States). Nanoscale and Quantum Phenomena Inst.; National Autonomous Univ. of Mexico (Mexico)

L1₀-structured MnGa(111) ultra-thin films were heteroepitaxially grown on GaN(0001) under lightly Mn-rich conditions using molecular beam epitaxy. Room-temperature scanning tunneling microscopy (STM) investigations reveal smooth terraces and angular step edges, with the surface structure consisting primarily of a 2x2 reconstruction along with small patches of 1x2. Theoretical calculations were undertaken using density functional theory, and the simulated STM images were calculated using the Tersoff-Hamann approximation, demonstrating that a stoichiometric 1x2 and a Mn-rich 2x2 surface structure give the best agreement with the observed experimental images.

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Research Organization:: Ohio Univ., Athens, OH (United States)

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

Contributing Organization:: Ohio Supercomputer Center

Grant/Contract Number:: FG02-06ER46317

OSTI ID:: 1633194

Journal Information:: Applied Physics Letters, Vol. 103, Issue 16; ISSN 0003-6951

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

Country of Publication:: United States

Language:: English

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Cited by: 15 works

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Spin injection in epitaxial MnGa(111)/GaN(0001) heterostructures Zube, Christian; Malindretos, Joerg; Watschke, Lars Journal of Applied Physics, Vol. 123, Issue 3 https://doi.org/10.1063/1.5000348	journal	January 2018
Rare-earth-free high energy product manganese-based magnetic materials Patel, Ketan; Zhang, Jingming; Ren, Shenqiang Nanoscale, Vol. 10, Issue 25 https://doi.org/10.1039/c8nr01847b	journal	January 2018
Engineered Heusler Ferrimagnets with a Large Perpendicular Magnetic Anisotropy Ranjbar, Reza; Suzuki, Kazuya; Sugihara, Atsushi Materials, Vol. 8, Issue 9 https://doi.org/10.3390/ma8095320	journal	September 2015

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Title: Heteroepitaxial growth and surface structure of L1₀-MnGa(111) ultra-thin films on GaN(0001)