Enhanced piezoresistive characteristics of Nb2O5 modified La0.8Sr0.2MnO3 ceramics

Vaneet Sharma; Maria R. Hossu; Woo Ho Lee; Ali R. Koymen; Shashank Priya

doi:10.1063/1.2387567

Enhanced piezoresistive characteristics of Nb₂O₅ modified La_0.8Sr_0.2MnO₃ ceramics

Vaneet Sharma, Maria R. Hossu, Woo Ho Lee, Ali R. Koymen, Shashank Priya

Materials Science and Engineering

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

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Abstract

This letter reports the giant piezoresistance phenomenon in Nb2 O5 modified La0.8 Sr0.2 Mn O3 (LSMO) polycrystalline ceramics. LSMO modified with 2 mol % Nb exhibited ∼2% change in resistivity at 19.2 MPa pressure as compared to 0.5% for the pure LSMO. A dramatic improvement was obtained for 5 mol % Nb-modified LSMO composition, which exhibited a linear change in resistivity with uniaxial stress and the fractional change was of the order of 3% at 19.2 MPa stress. The origin of the giant piezoresistance was found to be related to Nb substitution on the Mn sites which distorts the Mn-O bond, lowering the magnitude of stress required for the manganite lattice transformation.

Original language	English (US)
Article number	202902
Journal	Applied Physics Letters
Volume	89
Issue number	20
DOIs	https://doi.org/10.1063/1.2387567
State	Published - 2006

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.2387567

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title = "Enhanced piezoresistive characteristics of Nb2O5 modified La0.8Sr0.2MnO3 ceramics",

abstract = "This letter reports the giant piezoresistance phenomenon in Nb2 O5 modified La0.8 Sr0.2 Mn O3 (LSMO) polycrystalline ceramics. LSMO modified with 2 mol % Nb exhibited ∼2% change in resistivity at 19.2 MPa pressure as compared to 0.5% for the pure LSMO. A dramatic improvement was obtained for 5 mol % Nb-modified LSMO composition, which exhibited a linear change in resistivity with uniaxial stress and the fractional change was of the order of 3% at 19.2 MPa stress. The origin of the giant piezoresistance was found to be related to Nb substitution on the Mn sites which distorts the Mn-O bond, lowering the magnitude of stress required for the manganite lattice transformation.",

author = "Vaneet Sharma and Hossu, {Maria R.} and Lee, {Woo Ho} and Koymen, {Ali R.} and Shashank Priya",

note = "Funding Information: Two of the authors (M.R.H. and A.R.K.) were supported by Grant No. Y-1215 from The Welch Foundation. Two other authors (V.S. and S.P.) were supported by Texas ARP grant. ",

year = "2006",

doi = "10.1063/1.2387567",

language = "English (US)",

volume = "89",

journal = "Applied Physics Letters",

issn = "0003-6951",

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TY - JOUR

T1 - Enhanced piezoresistive characteristics of Nb2O5 modified La0.8Sr0.2MnO3 ceramics

AU - Sharma, Vaneet

AU - Hossu, Maria R.

AU - Lee, Woo Ho

AU - Koymen, Ali R.

AU - Priya, Shashank

N1 - Funding Information: Two of the authors (M.R.H. and A.R.K.) were supported by Grant No. Y-1215 from The Welch Foundation. Two other authors (V.S. and S.P.) were supported by Texas ARP grant.

PY - 2006

Y1 - 2006

N2 - This letter reports the giant piezoresistance phenomenon in Nb2 O5 modified La0.8 Sr0.2 Mn O3 (LSMO) polycrystalline ceramics. LSMO modified with 2 mol % Nb exhibited ∼2% change in resistivity at 19.2 MPa pressure as compared to 0.5% for the pure LSMO. A dramatic improvement was obtained for 5 mol % Nb-modified LSMO composition, which exhibited a linear change in resistivity with uniaxial stress and the fractional change was of the order of 3% at 19.2 MPa stress. The origin of the giant piezoresistance was found to be related to Nb substitution on the Mn sites which distorts the Mn-O bond, lowering the magnitude of stress required for the manganite lattice transformation.

AB - This letter reports the giant piezoresistance phenomenon in Nb2 O5 modified La0.8 Sr0.2 Mn O3 (LSMO) polycrystalline ceramics. LSMO modified with 2 mol % Nb exhibited ∼2% change in resistivity at 19.2 MPa pressure as compared to 0.5% for the pure LSMO. A dramatic improvement was obtained for 5 mol % Nb-modified LSMO composition, which exhibited a linear change in resistivity with uniaxial stress and the fractional change was of the order of 3% at 19.2 MPa stress. The origin of the giant piezoresistance was found to be related to Nb substitution on the Mn sites which distorts the Mn-O bond, lowering the magnitude of stress required for the manganite lattice transformation.

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Enhanced piezoresistive characteristics of Nb₂O₅ modified La_0.8Sr_0.2MnO₃ ceramics

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