Role of scaffold network in controlling strain and functionalities of nanocomposite films

Chen, Aiping; Hu, Jia -Mian; Lu, Ping; Yang, Tiannan; Zhang, Wenrui; Li, Leigang; Ahmed, T.; Enriquez, E.; Weigand, M.; Su, Qing; Wang, Haiyan; Zhu, J. -X.; MacManus-Driscoll, Judith L.; Chen, Long -Qing; Yarotski, D.; Jia, Q.

doi:10.1126/sciadv.1600245

Title: Role of scaffold network in controlling strain and functionalities of nanocomposite films

Journal Article · Fri Jun 10 00:00:00 EDT 2016 · Science Advances

DOI:https://doi.org/10.1126/sciadv.1600245· OSTI ID:1258582

Chen, Aiping ^[1]; Hu, Jia -Mian ^[2]; Lu, Ping ^[3]; Yang, Tiannan ^[2]; Zhang, Wenrui ^[4]; Li, Leigang ^[4]; Ahmed, T. ^[1]; Enriquez, E. ^[1]; Weigand, M. ^[1]; Su, Qing ^[4]; Wang, Haiyan ^[4]; Zhu, J. -X. ^[1]; MacManus-Driscoll, Judith L. ^[5]; Chen, Long -Qing ^[2]; Yarotski, D. ^[1]; Jia, Q. ^[1]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Pennsylvania State Univ., University Park, PA (United States)
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Texas A & M Univ., College Station, TX (United States)
Univ. of Cambridge (United Kingdom)

One novel approach to manipulating functionalities in correlated complex oxides is strain. However, significant epitaxial strain can only be achieved in ultrathin layers. We show that, under direct lattice matching framework, large and uniform vertical strain up to 2% can be achieved to significantly modify the magnetic anisotropy, magnetism, and magnetotransport properties in heteroepitaxial nanoscaffold films, over a few hundred nanometers in thickness. Comprehensive designing principles of large vertical strain have been proposed. Phase-field simulations not only reveal the strain distribution but also suggest that the ultimate strain is related to the vertical interfacial area and interfacial dislocation density. Moreover, by changing the nanoscaffold density and dimension, the strain and the magnetic properties can be tuned. The established correlation among the vertical interface—strain—properties in nanoscaffold films can consequently be used to tune other functionalities in a broad range of complex oxide films far beyond critical thickness.

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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC52-06NA25396

OSTI ID:: 1258582

Report Number(s):: LA-UR-16-21575

Journal Information:: Science Advances, Vol. 2, Issue 6; ISSN 2375-2548

Publisher:: AAASCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 79 works

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77 NANOSCIENCE AND NANOTECHNOLOGY
thin films
strain engineering
phase field simulation
microstructures
magnetoresistance
magnetic anisotrophy

Title: Role of scaffold network in controlling strain and functionalities of nanocomposite films

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