Low-temperature characteristics of Matsushita carbon resistors with and without magnetic fields

Y. Koike; T. Fukase; S. Morita; M. Okamura; N. Mikoshiba

doi:10.1016/0011-2275(85)90072-4

Low-temperature characteristics of Matsushita carbon resistors with and without magnetic fields

Y. Koike, T. Fukase, S. Morita, M. Okamura, N. Mikoshiba

ENG - Applied Physics

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

22 Citations (Scopus)

Abstract

The resistance versus temperature (RT) characteristics and magnetoresistance (MR) of 1/8 W nominal 68 Ω and 100 Ω Matsushita carbon resistors of grade ERC-18SG have been measured at temperatures between 8 and 0.05 K, in magnetic fields up to 84kOe (84 × 10⁶/4 π Am^-1). In both carbon resistors, the RT behaviour is expressed as R(T) = R₂exp{(T₂/T)^1/2} in the high temperature region and as R(T) = R₄exp{(T₄/T)^1/4} in the low temperature region. These relationships are explained as due to variable-range hopping conduction with and without the changing energy between isolated metallic grains, respectively. Negative and positive MR's have been observed in low and high magnetic fields, respectively. The negative MR increases with decreasing temperature at very low temperatures < 0.1 K. These phenomena are discussed in terms of the theory based on the strong Anderson localization.

Original language	English
Pages (from-to)	499-502
Number of pages	4
Journal	Cryogenics
Volume	25
Issue number	9
DOIs	https://doi.org/10.1016/0011-2275(85)90072-4
Publication status	Published - 1985 Sept

Keywords

carbon resistors
low temperature characteristics
magnetic fields

ASJC Scopus subject areas

Materials Science(all)
Physics and Astronomy(all)

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10.1016/0011-2275(85)90072-4

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title = "Low-temperature characteristics of Matsushita carbon resistors with and without magnetic fields",

abstract = "The resistance versus temperature (RT) characteristics and magnetoresistance (MR) of 1/8 W nominal 68 Ω and 100 Ω Matsushita carbon resistors of grade ERC-18SG have been measured at temperatures between 8 and 0.05 K, in magnetic fields up to 84kOe (84 × 106/4 π Am-1). In both carbon resistors, the RT behaviour is expressed as R(T) = R2exp{(T2/T)1/2} in the high temperature region and as R(T) = R4exp{(T4/T)1/4} in the low temperature region. These relationships are explained as due to variable-range hopping conduction with and without the changing energy between isolated metallic grains, respectively. Negative and positive MR's have been observed in low and high magnetic fields, respectively. The negative MR increases with decreasing temperature at very low temperatures < 0.1 K. These phenomena are discussed in terms of the theory based on the strong Anderson localization.",

keywords = "carbon resistors, low temperature characteristics, magnetic fields",

author = "Y. Koike and T. Fukase and S. Morita and M. Okamura and N. Mikoshiba",

year = "1985",

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TY - JOUR

T1 - Low-temperature characteristics of Matsushita carbon resistors with and without magnetic fields

AU - Koike, Y.

AU - Fukase, T.

AU - Morita, S.

AU - Okamura, M.

AU - Mikoshiba, N.

PY - 1985/9

Y1 - 1985/9

N2 - The resistance versus temperature (RT) characteristics and magnetoresistance (MR) of 1/8 W nominal 68 Ω and 100 Ω Matsushita carbon resistors of grade ERC-18SG have been measured at temperatures between 8 and 0.05 K, in magnetic fields up to 84kOe (84 × 106/4 π Am-1). In both carbon resistors, the RT behaviour is expressed as R(T) = R2exp{(T2/T)1/2} in the high temperature region and as R(T) = R4exp{(T4/T)1/4} in the low temperature region. These relationships are explained as due to variable-range hopping conduction with and without the changing energy between isolated metallic grains, respectively. Negative and positive MR's have been observed in low and high magnetic fields, respectively. The negative MR increases with decreasing temperature at very low temperatures < 0.1 K. These phenomena are discussed in terms of the theory based on the strong Anderson localization.

AB - The resistance versus temperature (RT) characteristics and magnetoresistance (MR) of 1/8 W nominal 68 Ω and 100 Ω Matsushita carbon resistors of grade ERC-18SG have been measured at temperatures between 8 and 0.05 K, in magnetic fields up to 84kOe (84 × 106/4 π Am-1). In both carbon resistors, the RT behaviour is expressed as R(T) = R2exp{(T2/T)1/2} in the high temperature region and as R(T) = R4exp{(T4/T)1/4} in the low temperature region. These relationships are explained as due to variable-range hopping conduction with and without the changing energy between isolated metallic grains, respectively. Negative and positive MR's have been observed in low and high magnetic fields, respectively. The negative MR increases with decreasing temperature at very low temperatures < 0.1 K. These phenomena are discussed in terms of the theory based on the strong Anderson localization.

KW - carbon resistors

KW - low temperature characteristics

KW - magnetic fields

UR - http://www.scopus.com/inward/record.url?scp=0022131121&partnerID=8YFLogxK

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U2 - 10.1016/0011-2275(85)90072-4

DO - 10.1016/0011-2275(85)90072-4

M3 - Article

AN - SCOPUS:0022131121

SN - 0011-2275

VL - 25

SP - 499

EP - 502

JO - Cryogenics

JF - Cryogenics

IS - 9

ER -

Low-temperature characteristics of Matsushita carbon resistors with and without magnetic fields

Abstract

Keywords

ASJC Scopus subject areas

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