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

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

Research output: Contribution to journalArticle

7 Citations (Scopus)

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 languageEnglish (US)
Article number202902
JournalApplied Physics Letters
Volume89
Issue number20
DOIs
StatePublished - Nov 23 2006

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ceramics
electrical resistivity
substitutes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

Sharma, Vaneet ; Hossu, Maria R. ; Lee, Woo Ho ; Koymen, Ali R. ; Priya, Shashank. / Enhanced piezoresistive characteristics of Nb2O5 modified La0.8Sr0.2MnO3 ceramics. In: Applied Physics Letters. 2006 ; Vol. 89, No. 20.
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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.",
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Enhanced piezoresistive characteristics of Nb2O5 modified La0.8Sr0.2MnO3 ceramics. / Sharma, Vaneet; Hossu, Maria R.; Lee, Woo Ho; Koymen, Ali R.; Priya, Shashank.

In: Applied Physics Letters, Vol. 89, No. 20, 202902, 23.11.2006.

Research output: Contribution to journalArticle

TY - JOUR

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

AU - Sharma, Vaneet

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AU - Priya, Shashank

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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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