Anomalous magnetoconductivity of epitaxial Nd0.7Sr0.3MnO3 and Pr0.7Sr0.3MnO3 films

G. C. Xiong; S. M. Bhagat; Q. Li; M. Domínguez; H. L. Ju; R. L. Greene; T. Venkatesan; Jeff M. Byers; Mark Rubinstein

doi:10.1016/0038-1098(95)00715-6

Anomalous magnetoconductivity of epitaxial Nd_0.7Sr_0.3MnO₃ and Pr_0.7Sr_0.3MnO₃ films

G. C. Xiong, S. M. Bhagat, Q. Li, M. Domínguez, H. L. Ju, R. L. Greene, T. Venkatesan, Jeff M. Byers, Mark Rubinstein

Department of Physics

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

5 Citations (Scopus)

Abstract

In Nd_0.7Sr_0.3MnO₃ films, ranging in peak resistivity from 1000 Ω-cm to ≤1 Ω-cm, and exhibiting large magnetoresistance effects, the zero-field resistivity above the peak temperature T_p exhibits thermally activated behavior with an activation energy of 0.115±0.005 eV. At T well below T_p, the magnetoconductivity, rather than the magnetoresistance, is linear in B and this linear dependence is observed over a wide B range even when the magnetization is essentially saturated. A cross-over from the linear relation to σ increasing as B² is observed near and above T_p. A tentative model is proposed.

Original language	English
Pages (from-to)	599-604
Number of pages	6
Journal	Solid State Communications
Volume	97
Issue number	7
DOIs	https://doi.org/10.1016/0038-1098(95)00715-6
Publication status	Published - 1996 Feb

Bibliographical note

Funding Information:
Acknowledgments.-T he authorsw ould like to thanku seful discussions with D. Drew and S.C. Wu, and the help of S. E. Lofland, X.G. Jiang, 5. Wu, X.X. Xi, C. Kwon and S.N. Mao. R.L.G. and T.V. acknowledge partial support from NSF contract No. DMR9510475. G.C.X. thanks the IUEP Committeeo f the University of Maryland. M.D. and J.M.B. thank the DGICYT (Spain) and the NRC, respectively,f or a postdoctorafle llowship.

All Science Journal Classification (ASJC) codes

Chemistry(all)
Condensed Matter Physics
Materials Chemistry

Access to Document

10.1016/0038-1098(95)00715-6

Cite this

@article{477f3b73db614dfc9eec774f1407a56a,

title = "Anomalous magnetoconductivity of epitaxial Nd0.7Sr0.3MnO3 and Pr0.7Sr0.3MnO3 films",

abstract = "In Nd0.7Sr0.3MnO3 films, ranging in peak resistivity from 1000 Ω-cm to ≤1 Ω-cm, and exhibiting large magnetoresistance effects, the zero-field resistivity above the peak temperature Tp exhibits thermally activated behavior with an activation energy of 0.115±0.005 eV. At T well below Tp, the magnetoconductivity, rather than the magnetoresistance, is linear in B and this linear dependence is observed over a wide B range even when the magnetization is essentially saturated. A cross-over from the linear relation to σ increasing as B2 is observed near and above Tp. A tentative model is proposed.",

author = "Xiong, {G. C.} and Bhagat, {S. M.} and Q. Li and M. Dom{\'i}nguez and Ju, {H. L.} and Greene, {R. L.} and T. Venkatesan and Byers, {Jeff M.} and Mark Rubinstein",

note = "Funding Information: Acknowledgments.-T he authorsw ould like to thanku seful discussions with D. Drew and S.C. Wu, and the help of S. E. Lofland, X.G. Jiang, 5. Wu, X.X. Xi, C. Kwon and S.N. Mao. R.L.G. and T.V. acknowledge partial support from NSF contract No. DMR9510475. G.C.X. thanks the IUEP Committeeo f the University of Maryland. M.D. and J.M.B. thank the DGICYT (Spain) and the NRC, respectively,f or a postdoctorafle llowship.",

year = "1996",

month = feb,

doi = "10.1016/0038-1098(95)00715-6",

language = "English",

volume = "97",

pages = "599--604",

journal = "Solid State Communications",

issn = "0038-1098",

publisher = "Elsevier Limited",

number = "7",

}

TY - JOUR

T1 - Anomalous magnetoconductivity of epitaxial Nd0.7Sr0.3MnO3 and Pr0.7Sr0.3MnO3 films

AU - Xiong, G. C.

AU - Bhagat, S. M.

AU - Li, Q.

AU - Domínguez, M.

AU - Ju, H. L.

AU - Greene, R. L.

AU - Venkatesan, T.

AU - Byers, Jeff M.

AU - Rubinstein, Mark

N1 - Funding Information: Acknowledgments.-T he authorsw ould like to thanku seful discussions with D. Drew and S.C. Wu, and the help of S. E. Lofland, X.G. Jiang, 5. Wu, X.X. Xi, C. Kwon and S.N. Mao. R.L.G. and T.V. acknowledge partial support from NSF contract No. DMR9510475. G.C.X. thanks the IUEP Committeeo f the University of Maryland. M.D. and J.M.B. thank the DGICYT (Spain) and the NRC, respectively,f or a postdoctorafle llowship.

PY - 1996/2

Y1 - 1996/2

N2 - In Nd0.7Sr0.3MnO3 films, ranging in peak resistivity from 1000 Ω-cm to ≤1 Ω-cm, and exhibiting large magnetoresistance effects, the zero-field resistivity above the peak temperature Tp exhibits thermally activated behavior with an activation energy of 0.115±0.005 eV. At T well below Tp, the magnetoconductivity, rather than the magnetoresistance, is linear in B and this linear dependence is observed over a wide B range even when the magnetization is essentially saturated. A cross-over from the linear relation to σ increasing as B2 is observed near and above Tp. A tentative model is proposed.

AB - In Nd0.7Sr0.3MnO3 films, ranging in peak resistivity from 1000 Ω-cm to ≤1 Ω-cm, and exhibiting large magnetoresistance effects, the zero-field resistivity above the peak temperature Tp exhibits thermally activated behavior with an activation energy of 0.115±0.005 eV. At T well below Tp, the magnetoconductivity, rather than the magnetoresistance, is linear in B and this linear dependence is observed over a wide B range even when the magnetization is essentially saturated. A cross-over from the linear relation to σ increasing as B2 is observed near and above Tp. A tentative model is proposed.

UR - http://www.scopus.com/inward/record.url?scp=0030083658&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0030083658&partnerID=8YFLogxK

U2 - 10.1016/0038-1098(95)00715-6

DO - 10.1016/0038-1098(95)00715-6

M3 - Article

AN - SCOPUS:0030083658

SN - 0038-1098

VL - 97

SP - 599

EP - 604

JO - Solid State Communications

JF - Solid State Communications

IS - 7

ER -