Direct measurement of nanomechanical actuation across phase transition in VO2 crystals

Davinder Singh; B. Viswanath

doi:10.1016/j.scriptamat.2017.07.014

Direct measurement of nanomechanical actuation across phase transition in VO₂ crystals

Davinder Singh
, B. Viswanath

Indian Institute of Technology Mandi

Research output: Contribution to journal › Article › peer-review

Abstract

We employ in situ nanoindentation method to measure spontaneous strain during thermally induced structural phase transition in VO₂ crystals. Large tip displacement of ~ 520 nm is observed normal to (011) facet of VO₂ crystals during phase transition. The captured actuation signals in the form of tip displacement from VO₂ indicate 0.53% of spontaneous strain normal to (011) facet during phase transition. Spontaneous strain across phase transition is found to be reversible over thermal cycles with different heating rates. The investigated aspects demonstrate the application of nanoindentation in quantifying actuation of VO₂ micro crystals towards highly efficient thermal actuators.

Original language	English
Pages (from-to)	24-27
Number of pages	4
Journal	Scripta Materialia
Volume	141
DOIs	https://doi.org/10.1016/j.scriptamat.2017.07.014
Publication status	Published - Dec 2017
Externally published	Yes

Keywords

Actuation
Nanoindentation
Phase transition
Vanadium dioxide

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10.1016/j.scriptamat.2017.07.014

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title = "Direct measurement of nanomechanical actuation across phase transition in VO2 crystals",

abstract = "We employ in situ nanoindentation method to measure spontaneous strain during thermally induced structural phase transition in VO2 crystals. Large tip displacement of \textasciitilde{} 520 nm is observed normal to (011) facet of VO2 crystals during phase transition. The captured actuation signals in the form of tip displacement from VO2 indicate 0.53\% of spontaneous strain normal to (011) facet during phase transition. Spontaneous strain across phase transition is found to be reversible over thermal cycles with different heating rates. The investigated aspects demonstrate the application of nanoindentation in quantifying actuation of VO2 micro crystals towards highly efficient thermal actuators.",

keywords = "Actuation, Nanoindentation, Phase transition, Vanadium dioxide",

author = "Davinder Singh and B. Viswanath",

note = "Publisher Copyright: {\textcopyright} 2017 Acta Materialia Inc.",

year = "2017",

month = dec,

doi = "10.1016/j.scriptamat.2017.07.014",

language = "English",

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T1 - Direct measurement of nanomechanical actuation across phase transition in VO2 crystals

AU - Singh, Davinder

AU - Viswanath, B.

PY - 2017/12

Y1 - 2017/12

N2 - We employ in situ nanoindentation method to measure spontaneous strain during thermally induced structural phase transition in VO2 crystals. Large tip displacement of ~ 520 nm is observed normal to (011) facet of VO2 crystals during phase transition. The captured actuation signals in the form of tip displacement from VO2 indicate 0.53% of spontaneous strain normal to (011) facet during phase transition. Spontaneous strain across phase transition is found to be reversible over thermal cycles with different heating rates. The investigated aspects demonstrate the application of nanoindentation in quantifying actuation of VO2 micro crystals towards highly efficient thermal actuators.

AB - We employ in situ nanoindentation method to measure spontaneous strain during thermally induced structural phase transition in VO2 crystals. Large tip displacement of ~ 520 nm is observed normal to (011) facet of VO2 crystals during phase transition. The captured actuation signals in the form of tip displacement from VO2 indicate 0.53% of spontaneous strain normal to (011) facet during phase transition. Spontaneous strain across phase transition is found to be reversible over thermal cycles with different heating rates. The investigated aspects demonstrate the application of nanoindentation in quantifying actuation of VO2 micro crystals towards highly efficient thermal actuators.

KW - Actuation

KW - Nanoindentation

KW - Phase transition

KW - Vanadium dioxide

UR - https://www.scopus.com/pages/publications/85025156343

U2 - 10.1016/j.scriptamat.2017.07.014

DO - 10.1016/j.scriptamat.2017.07.014

M3 - Article

AN - SCOPUS:85025156343

SN - 1359-6462

VL - 141

SP - 24

EP - 27

JO - Scripta Materialia

JF - Scripta Materialia

ER -

Direct measurement of nanomechanical actuation across phase transition in VO₂ crystals

Abstract

Keywords

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