Unusual hall effect in superconducting MgB2 films

R. Jin; M. Paranthaman; H. Y. Zhai; H. M. Christen; D. K. Christen; D. Mandrus

Unusual hall effect in superconducting MgB₂ films

R. Jin, M. Paranthaman, H. Y. Zhai, H. M. Christen, D. K. Christen, D. Mandrus

Nanomaterials Chemistry Group

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

54 Scopus citations

Abstract

We have investigated the temperature and magnetic field dependence of the Hall coefficient of two well-characterized superconducting MgB₂ films, (T_c0 = 38.0 K) in both the normal and superconducting states. Our results show that the normal-state Hall coefficient R_H is positive and increases with decreasing temperature, independent of the applied magnetic field (to 8 T). We find that R_H^-1αT(40-300 K) and cotθ_H αT²(100-300 K). As the sample is cooled below T_c(H), R_H decreases rapidly with temperature and changes sign before it reaches zero. The position and magnitude at which R_H shows a minimum depends on the applied field.

Original language	English
Article number	220506
Pages (from-to)	2205061-2205064
Number of pages	4
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	64
Issue number	22
State	Published - Dec 1 2001

Cite this

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title = "Unusual hall effect in superconducting MgB2 films",

abstract = "We have investigated the temperature and magnetic field dependence of the Hall coefficient of two well-characterized superconducting MgB2 films, (Tc0 = 38.0 K) in both the normal and superconducting states. Our results show that the normal-state Hall coefficient RH is positive and increases with decreasing temperature, independent of the applied magnetic field (to 8 T). We find that RH-1αT(40-300 K) and cotθH αT2(100-300 K). As the sample is cooled below Tc(H), RH decreases rapidly with temperature and changes sign before it reaches zero. The position and magnitude at which RH shows a minimum depends on the applied field.",

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T1 - Unusual hall effect in superconducting MgB2 films

AU - Jin, R.

AU - Paranthaman, M.

AU - Zhai, H. Y.

AU - Christen, H. M.

AU - Christen, D. K.

AU - Mandrus, D.

PY - 2001/12/1

Y1 - 2001/12/1

N2 - We have investigated the temperature and magnetic field dependence of the Hall coefficient of two well-characterized superconducting MgB2 films, (Tc0 = 38.0 K) in both the normal and superconducting states. Our results show that the normal-state Hall coefficient RH is positive and increases with decreasing temperature, independent of the applied magnetic field (to 8 T). We find that RH-1αT(40-300 K) and cotθH αT2(100-300 K). As the sample is cooled below Tc(H), RH decreases rapidly with temperature and changes sign before it reaches zero. The position and magnitude at which RH shows a minimum depends on the applied field.

AB - We have investigated the temperature and magnetic field dependence of the Hall coefficient of two well-characterized superconducting MgB2 films, (Tc0 = 38.0 K) in both the normal and superconducting states. Our results show that the normal-state Hall coefficient RH is positive and increases with decreasing temperature, independent of the applied magnetic field (to 8 T). We find that RH-1αT(40-300 K) and cotθH αT2(100-300 K). As the sample is cooled below Tc(H), RH decreases rapidly with temperature and changes sign before it reaches zero. The position and magnitude at which RH shows a minimum depends on the applied field.

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M3 - Article

AN - SCOPUS:0035587082

SN - 0163-1829

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SP - 2205061

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JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 22

M1 - 220506

ER -

Unusual hall effect in superconducting MgB₂ films

Abstract

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