Effect of A-site dopant on the piezoresistive characteristics of La 0.8Sr0.2MnO3 ceramics

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

doi:10.1007/s10853-007-1904-3

Effect of A-site dopant on the piezoresistive characteristics of La _0.8Sr_0.2MnO₃ ceramics

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

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

3 Scopus citations

Abstract

This letter reports the effect of the A-site doping (2, 4, and 6 mol% Bi and Li) on the piezoresistance phenomenon in La_0.8Sr _0.2MnO₃ (LSMO) polycrystalline ceramics. The fractional change in resistivity was found to be nominal for Li-modified samples but samples modified with 4 and 6 mol% Bi₂O₃ exhibited 1.8% and 2.3% fractional change in resistivity [ρ_o - ρ _σ)/ρ_o] at 19.2 MPa which is significantly higher than that for pure LSMO. The enhancement in piezoresistive phenomenon is attributed to distortion of Mn-O bond due to substitution of smaller ion on to La-site. All the samples showed a sudden increase in resistivity with applied stress in the range of 0.5-2 MPa and the behavior was found to saturate as the magnitude of applied stress increases. Magnetic measurements as a function of field and temperature were conducted to confirm the A-site substitution.

Original language	English (US)
Pages (from-to)	9841-9844
Number of pages	4
Journal	Journal of Materials Science
Volume	42
Issue number	23
DOIs	https://doi.org/10.1007/s10853-007-1904-3
State	Published - Dec 2007
Externally published	Yes

Bibliographical note

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

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10.1007/s10853-007-1904-3

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@article{14ff3994e43b42eb8538d8a3c95ea57b,

title = "Effect of A-site dopant on the piezoresistive characteristics of La 0.8Sr0.2MnO3 ceramics",

abstract = "This letter reports the effect of the A-site doping (2, 4, and 6 mol\% Bi and Li) on the piezoresistance phenomenon in La0.8Sr 0.2MnO3 (LSMO) polycrystalline ceramics. The fractional change in resistivity was found to be nominal for Li-modified samples but samples modified with 4 and 6 mol\% Bi2O3 exhibited 1.8\% and 2.3\% fractional change in resistivity [ρo - ρ σ)/ρo] at 19.2 MPa which is significantly higher than that for pure LSMO. The enhancement in piezoresistive phenomenon is attributed to distortion of Mn-O bond due to substitution of smaller ion on to La-site. All the samples showed a sudden increase in resistivity with applied stress in the range of 0.5-2 MPa and the behavior was found to saturate as the magnitude of applied stress increases. Magnetic measurements as a function of field and temperature were conducted to confirm the A-site substitution.",

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

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

year = "2007",

month = dec,

doi = "10.1007/s10853-007-1904-3",

language = "English (US)",

volume = "42",

pages = "9841--9844",

journal = "Journal of Materials Science",

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T1 - Effect of A-site dopant on the piezoresistive characteristics of La 0.8Sr0.2MnO3 ceramics

AU - Sharma, Vaneet

AU - Hossu, Maria R.

AU - Lee, Woo Ho

AU - Koymen, Ali R.

AU - Priya, Shashank

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

PY - 2007/12

Y1 - 2007/12

N2 - This letter reports the effect of the A-site doping (2, 4, and 6 mol% Bi and Li) on the piezoresistance phenomenon in La0.8Sr 0.2MnO3 (LSMO) polycrystalline ceramics. The fractional change in resistivity was found to be nominal for Li-modified samples but samples modified with 4 and 6 mol% Bi2O3 exhibited 1.8% and 2.3% fractional change in resistivity [ρo - ρ σ)/ρo] at 19.2 MPa which is significantly higher than that for pure LSMO. The enhancement in piezoresistive phenomenon is attributed to distortion of Mn-O bond due to substitution of smaller ion on to La-site. All the samples showed a sudden increase in resistivity with applied stress in the range of 0.5-2 MPa and the behavior was found to saturate as the magnitude of applied stress increases. Magnetic measurements as a function of field and temperature were conducted to confirm the A-site substitution.

AB - This letter reports the effect of the A-site doping (2, 4, and 6 mol% Bi and Li) on the piezoresistance phenomenon in La0.8Sr 0.2MnO3 (LSMO) polycrystalline ceramics. The fractional change in resistivity was found to be nominal for Li-modified samples but samples modified with 4 and 6 mol% Bi2O3 exhibited 1.8% and 2.3% fractional change in resistivity [ρo - ρ σ)/ρo] at 19.2 MPa which is significantly higher than that for pure LSMO. The enhancement in piezoresistive phenomenon is attributed to distortion of Mn-O bond due to substitution of smaller ion on to La-site. All the samples showed a sudden increase in resistivity with applied stress in the range of 0.5-2 MPa and the behavior was found to saturate as the magnitude of applied stress increases. Magnetic measurements as a function of field and temperature were conducted to confirm the A-site substitution.

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DO - 10.1007/s10853-007-1904-3

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JO - Journal of Materials Science

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