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<p>Crystals often have complex structural domains, but a general method to remove or deterministically control such local heterogeneity is lacking. The resulting heterogeneity in crystal orientations obscures our understanding of material properties and can reduce the reliability and performance of related applications. Here, using shear stress from an atomic force microscope tip, we ferroelastically write local crystal orientations in oxide thin films. Applying this deterministic and reversible control to SrRuO<sub>3</sub> and (La<sub>0.7</sub>Sr<sub>0.3</sub>)(Mn<sub>0.9</sub>Ru<sub>0.1</sub>)O<sub>3</sub> films, we realize twin-free single crystals and design specific crystal-orientation domain textures at the nanoscale. Furthermore, through magnetoelastic coupling, we can mechanically manipulate the local magnetic anisotropy, and thereby write and erase functional nanoscale magnetic textures unattainable by conventional methods. Thus, pure mechanical force emerges as a means to control structural heterogeneity on demand and may make it possible to program electronic and spintronic functionalities.</p>

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Ferroelastic writing of crystal directions in oxide thin films

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年6月5日

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  • Wei Peng,
  • Wenjie Meng,
  • Younji Kim,
  • Jiyong Yoon,
  • Liang Si,
  • Kesen Zhao,
  • Shuai Dong,
  • Yubin Hou,
  • Chuanying Xi,
  • Li Pi,
  • Aditya Singh,
  • Ana M. Sanchez,
  • Richard Beanland,
  • Tae Won Noh,
  • Qingyou Lu,
  • Daesu Lee,
  • Marin Alexe

摘要

Crystals often have complex structural domains, but a general method to remove or deterministically control such local heterogeneity is lacking. The resulting heterogeneity in crystal orientations obscures our understanding of material properties and can reduce the reliability and performance of related applications. Here, using shear stress from an atomic force microscope tip, we ferroelastically write local crystal orientations in oxide thin films. Applying this deterministic and reversible control to SrRuO3 and (La0.7Sr0.3)(Mn0.9Ru0.1)O3 films, we realize twin-free single crystals and design specific crystal-orientation domain textures at the nanoscale. Furthermore, through magnetoelastic coupling, we can mechanically manipulate the local magnetic anisotropy, and thereby write and erase functional nanoscale magnetic textures unattainable by conventional methods. Thus, pure mechanical force emerges as a means to control structural heterogeneity on demand and may make it possible to program electronic and spintronic functionalities.