Galvanomagnetic Effect of an Y–Ba–Cu–O Ceramic Superconductor and Its Application to Magnetic Sensors

Nojima, Hideo; Tsuchimoto, Shuhei; Kataoka, S.

doi:10.1143/jjap.27.746

Cited by 36 publications

(15 citation statements)

References 8 publications

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“…Currently, the cryogenic magnetic sensors commonly used are based on the Hall effect, or the magnetoresistive (MR) effect in semiconductors [1]. Both these type of sensors are expensive.…”

Section: Introductionmentioning

confidence: 99%

Large magnetoresistive effect in bulk Bi2212 with small additions of USr₂CaO₆

Ionescu¹,

Winton²,

Silver³

et al. 2004

J. Phys. D: Appl. Phys.

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A large magnetoresistive (MR) effect was observed in Bi2212 in which USr2CaO6 was added in a proportion of 6 wt%. The resistivity of melt-textured (MT) Bi2212 + 6 wt% USr2CaO6 possess a high sensitivity to applied dc fields, as compared to pure Bi2212, in particular at low fields, below 3 T, and in a temperature range between 45 and 85 K. In this temperature range, the MR effects of MT Bi2212 + 6 wt% USr2CaO6 display a maximum that may be tuned to a particular temperature within the above range, by changing the amount of added non-superconducting compound. X-ray results show that during the melt-texturing process of this mixture, the USr2CaO6 phase is stable and the reaction with Bi2212 matrix is minimal, in spite of a small decrease in the superconducting transition temperature. A cryogenic sensor was build and tested at 77 K in low fields. It shows high sensitivity and no hysteresis of resistivity when the applied field was cycled between 0 and 1 T.

show abstract

“…Currently, the cryogenic magnetic sensors commonly used are based on the Hall effect, or the magnetoresistive (MR) effect in semiconductors [1]. Both these type of sensors are expensive.…”

Section: Introductionmentioning

confidence: 99%

Large magnetoresistive effect in bulk Bi2212 with small additions of USr₂CaO₆

Ionescu¹,

Winton²,

Silver³

et al. 2004

J. Phys. D: Appl. Phys.

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show abstract

“…Currently, the cryogenic magnetic sensors commonly used are based on the Hall effect, or the magnetoresistive (MR) effect in semiconductors. 1 Both types of sensors are expensive. The emerging materials with possible applications as a cryogenic magnetic sensors are the colossal MR (CMR) materials.…”

mentioning

confidence: 99%

Cryogenic magnetic field sensor based on the magnetoresistive effect in bulk Bi2212+USr2CaO6

Ionescu

Winton

Silver

et al. 2004

Applied Physics Letters

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A large magnetoresistive (MR) effect was observed in melt-textured (MT) Bi2212 in which USr2CaO6 was added in a proportion of 6wt%. The resistivity measurements of MT Bi2212+6wt% USr2CaO6 show high sensitivity to applied dc fields, as compared to pure Bi2212, in particular at low fields, below 3T, and in a temperature range between 45K and 85K. In this temperature range, the MR effect of MT Bi2212+6wt% USr2CaO6 is two orders of magnitude larger than the MR effect in pure Bi2212, and display a maximum that may be tuned to a particular temperature within the above range, by changing the amount of added nonsuperconducting compound. A cryogenic sensor was built and tested at 77K in low fields. It shows a good sensitivity and small (∼1%) hysteresis of resistivity when the applied field was cycled between 0T and 1T.

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“…Polycrystalline high-temperature superconductors, HTSC's, exhibit large magnetoresistance in weak magnetic fields (tens of Oersteds) [1][2]. This effect can be used in devices that demand a sensitive electrical response for a weak magnetic field.…”

Section: -Introductionmentioning

confidence: 99%

“…This effect can be used in devices that demand a sensitive electrical response for a weak magnetic field. In this sense, polycrystalline bulk HTSC's is more attractive materials than conventional magnetic sensors that utilize the Hall effect or the magnetoresistive (MR) effect in semiconductors [1]. The resistive transition of all HTSC's broadens in applied magnetic fields [3].…”

Section: -Introductionmentioning

confidence: 99%