Large piezoresistivity phenomenon in SiCN-(La,Sr) MnO3 composites

Makarand Karmarkar; Gurpreet Singh; Sandeep Shah; Roop L. Mahajan; Shashank Priya

doi:10.1063/1.3078271

Large piezoresistivity phenomenon in SiCN-(La,Sr) MnO₃ composites

Makarand Karmarkar, Gurpreet Singh, Sandeep Shah, Roop L. Mahajan, Shashank Priya

Materials Science and Engineering

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

3 Scopus citations

Abstract

We present the results on SiCN- (La,Sr) MnO₃ (LSMO) composites correlating the observed large piezoresistance behavior with the microstructural features and defect chemistry. Scanning electron microscopy characterization revealed the presence of self-assembled periodic microvalleys in the microstructure with width of 1-5 μm and depth of 600-1000 nm. The microvalleys act as stress concentration points providing change in volume with applied stress. High resolution transmission electron microscopy measurements conducted on composites showed that LSMO grains consist of SiCN phase but no inclusions were observed.

Original language	English (US)
Article number	072902
Journal	Applied Physics Letters
Volume	94
Issue number	7
DOIs	https://doi.org/10.1063/1.3078271
State	Published - 2009

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.3078271

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title = "Large piezoresistivity phenomenon in SiCN-(La,Sr) MnO3 composites",

abstract = "We present the results on SiCN- (La,Sr) MnO3 (LSMO) composites correlating the observed large piezoresistance behavior with the microstructural features and defect chemistry. Scanning electron microscopy characterization revealed the presence of self-assembled periodic microvalleys in the microstructure with width of 1-5 μm and depth of 600-1000 nm. The microvalleys act as stress concentration points providing change in volume with applied stress. High resolution transmission electron microscopy measurements conducted on composites showed that LSMO grains consist of SiCN phase but no inclusions were observed.",

author = "Makarand Karmarkar and Gurpreet Singh and Sandeep Shah and Mahajan, {Roop L.} and Shashank Priya",

note = "Funding Information: G. Singh would like to thank D. Ahn at the University of Colorado for useful discussions on SiCN composites. Thanks are also due to instrument specialists at the Nano Characterization and Fabrication Laboratory (NCFL) and ESM. The authors (M.K. and S.P.) would like to acknowledge financial support from the Office of Naval Research (Grant No. N00014-08-1-0654)",

year = "2009",

doi = "10.1063/1.3078271",

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volume = "94",

journal = "Applied Physics Letters",

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TY - JOUR

T1 - Large piezoresistivity phenomenon in SiCN-(La,Sr) MnO3 composites

AU - Karmarkar, Makarand

AU - Singh, Gurpreet

AU - Shah, Sandeep

AU - Mahajan, Roop L.

AU - Priya, Shashank

N1 - Funding Information: G. Singh would like to thank D. Ahn at the University of Colorado for useful discussions on SiCN composites. Thanks are also due to instrument specialists at the Nano Characterization and Fabrication Laboratory (NCFL) and ESM. The authors (M.K. and S.P.) would like to acknowledge financial support from the Office of Naval Research (Grant No. N00014-08-1-0654)

PY - 2009

Y1 - 2009

N2 - We present the results on SiCN- (La,Sr) MnO3 (LSMO) composites correlating the observed large piezoresistance behavior with the microstructural features and defect chemistry. Scanning electron microscopy characterization revealed the presence of self-assembled periodic microvalleys in the microstructure with width of 1-5 μm and depth of 600-1000 nm. The microvalleys act as stress concentration points providing change in volume with applied stress. High resolution transmission electron microscopy measurements conducted on composites showed that LSMO grains consist of SiCN phase but no inclusions were observed.

AB - We present the results on SiCN- (La,Sr) MnO3 (LSMO) composites correlating the observed large piezoresistance behavior with the microstructural features and defect chemistry. Scanning electron microscopy characterization revealed the presence of self-assembled periodic microvalleys in the microstructure with width of 1-5 μm and depth of 600-1000 nm. The microvalleys act as stress concentration points providing change in volume with applied stress. High resolution transmission electron microscopy measurements conducted on composites showed that LSMO grains consist of SiCN phase but no inclusions were observed.

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JF - Applied Physics Letters

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ER -

Large piezoresistivity phenomenon in SiCN-(La,Sr) MnO₃ composites

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