Elastic moduli from crystalline micro-mechanical oscillators carved by focused ion beam

Author:

Estry Amelia1ORCID,Putzke Carsten12ORCID,Guo Chunyu12ORCID,Bachmann Maja3,Duvakina Anna1ORCID,Posva Ferdinand1,Diaz Jonas1ORCID,Gawryluk Dariusz J.4ORCID,Medarde Marisa4ORCID,Moll Philip12ORCID

Affiliation:

1. Institute of Materials (IMX), Ecole Polytechnique Fédérale de Lausanne (EPFL) 1 , 1015 Lausanne, Vaud, Switzerland

2. Max Planck Institute for Structure and Dynamics of Matter 2 , 22761 Hamburg, Germany

3. Max Planck Institute for Chemical Phyiscs of Solids 3 , 01187 Dresden, Saxony, Germany

4. Laboratory for Multiscale Materials Experiments, Paul Scherrer Institute 4 , 5232 Villigen PSI, Aargau, Switzerland

Abstract

The elastic moduli provide unique insights into the thermodynamics of quantum materials, particularly into the symmetries broken at their phase transition. Here, we present a workflow to carve crystalline resonators via focused ion beam milling from small and oddly shaped crystals unsuitable for traditional measurements of elasticity. The accuracy of this technique is first established in silicon. Next, we showcase the capacity to probe changes in the electronic state with a resolution on the measured resonance frequency as small as 0.01% on YNiO3, a rare-earth perovskite nickelate, in which bulk single crystals have typical length scales of ≈40μm. Here, we observe a sharp 0.2% discontinuity in Young’s modulus of an YNiO3 cantilever at a magnetic phase transition. Finally, an additional potential of using free-standing cantilevers as a tool for examining the time-dependence of chemical changes is illustrated by laser-heating YNiO3.

Funder

Swiss National Science Foundation

Publisher

AIP Publishing

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