Thick film chip resistors for use as low temperature thermometers

Li, Q.; Watson, C. H.; Goodrich, R. G.; Haase, David G.; Lukefahr, H. G.

doi:10.1016/0011-2275(86)90095-0

Cited by 58 publications

(16 citation statements)

References 8 publications

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“…A twin Dale resistor was attached to the base. RuO 2 thick film resistors have been successfully used as thermometers from 0.015 to 80 K in magnetic fields up to 20 T [13]. The resistances for the two resistors, read with a self-balancing resistance bridge (Linear Research, LR700) using a power = 10 −15 W and calibrated against a He 3 melting curve thermometer, were found to have identical temperature dependencies above 10 mK with very little scatter, see Fig.…”

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confidence: 99%

Low Temperature Acoustic Properties of Amorphous Silica and the Tunneling Model

et al. 2000

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Internal friction and speed of sound of a-SiO2 was measured above 6 mK using a torsional oscillator at 90 kHz, controlling for thermal decoupling, non-linear effects, and clamping losses. Strain amplitudes ǫA = 10 −8 mark the transition between the linear and non-linear regime. In the linear regime, excellent agreement with the Tunneling Model was observed for both the internal friction and speed of sound, with a cut-off energy of ∆o,min/kB = 6.6 mK. In the non-linear regime, two different behaviors were observed. Above 10 mK the behavior was typical for non-linear harmonic oscillators, while below 10 mK a different behavior was found. Its origin is not understood.PACS numbers: 61.43. Fs, 62.54.+k, 63.50.+x The low temperature acoustic, thermal, and dielectric properties of amorphous solids have long been successfully described by the phenomenological Tunneling Model (TM). In this model, the low energy localized vibrational excitations, a common feature of amorphous solids, are described by non-interacting two-level defects which are thought to be caused by tunneling of atoms or groups of atoms between nearly degenerate potential minima. The excitation energy between the two lowest states of the double well potential, E = ∆ 2 + ∆ 2 o , is determined by the asymmetry, ∆ and the tunneling splitting, ∆ o [1]. Low temperature internal friction and speed of sound measurements on a-SiO 2 using the torsional oscillator technique between 66 and 160 kHz above 50 mK have shown excellent agreement with the TM [2,3]. However, several acoustic and dielectric experiments have indicated deviations from this model below 100 mK [4][5][6][7][8] and have been interpreted as evidence for tunneling defect interactions [9,10]. This discrepancy provided the impetus for the present study in which we extended the acoustic measurements to 6 mK.In low temperature acoustic measurements, a major cause of uncertainty are thermal decoupling caused by spurious heat input and self heating, non-linear effects resulting from moderate strain amplitudes, and lack of knowledge of the influence of mounting [2,5,6,8,10]. Taking particular care to control these problems, we report here measurements in the extended temperature range which are in excellent agreement with the predictions of the TM with a low energy cut-off in the tunneling state spectrum, ∆ o,min /k B = 6.6 mK. These results emphasize the extreme care with which low temperature acoustic work must be carried out.

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confidence: 99%

Low Temperature Acoustic Properties of Amorphous Silica and the Tunneling Model

et al. 2000

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“…The present result, p = 1/4, supports the constant density of states, n = 0, around the Fermi level rather than the Coulomb pseudo gap, n = 2. Good fits with p = 1/4 have also been reported for the resistors manufactured both by ALPS [3] and by Dale (RCWP575 [5], RC550 [10]). …”

Section: B Temperature Dependence In Zero Magnetic Fieldmentioning

confidence: 59%

“…The advantages of such resistors are reproducibility and reasonably small magnetoresistance. In order to implement the accuracy of the thermometry in magnetic fields, a lot of works has been devoted to the magnetoresistance measurements of RuO 2 -based resistors [2][3][4][5][6][7][8][9][10][11]. Unfortunately, the magnetoresistance seems to be dependent on the detail of the manufacturing process.…”

Section: Introductionmentioning

confidence: 99%

Magnetoresistance of RuO2-based resistance thermometers below 0.3 K

2001

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We have determined the magnetoresistance of RuO2-based resistors (Scientific Instruments (SI) RO-600) between 0.05 and 0.3 K in magnetic fields up to 8 T. The magnetoresistance is negative around 0.5 T and then becomes positive at larger fields. The magnitude of the negative magnetoresistance increases rapidly as the temperature is lowered, while that of the positive magnetoresistance has smaller temperature dependence. We have also examined the temperature dependence of the resistance below 50 mK in zero magnetic field. It is described in the context of variable-range-hopping (VRH) conduction down to 15 mK. Hence, the resistors can be used as thermometers down to at least 15 mK.

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“…The RuO 2 thick-film resistor with a nominal resistance of 1.8 kΩ (KOA, RK73K1EJ) was adopted as the resistance thermometer of the calorimetry in magnetic field because of its advantages of high sensitivity at low temperature, small heat capacity, fast thermal response time, and low cost. 22,23,24,25,26,27,28,29 For the calibration of the thermometer in zero field, commercially calibrated RuO 2 thermometer (Scientific Instruments, model RO600A2) was used in the range from 50 mK to 8 K. The inset in Fig. 3 shows the temperature dependence of resistance of the addenda thermometer in zero field.…”

Section: Calibrationmentioning

confidence: 99%

Field-orientation dependent heat capacity measurements at low temperatures with a vector magnet system

Deguchi

Ishiguro

Maeno

2004

Review of Scientific Instruments

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We describe a heat capacity measurement system for the study of the field-orientation dependence for temperatures down to 50 mK. A "vector magnet" combined with a mechanical rotator for the dewar enables the rotation of the magnetic field without mechanical heating in the cryostat by friction. High reproducibility of the field direction, as well as an angular resolution of better than 0.01 • , is obtained. This system is applicable to other kinds of measurements which require a large sample space or an adiabatic sample environment, and can also be used with multiple refrigerator inserts interchangeably.

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Thick film chip resistors for use as low temperature thermometers

Cited by 58 publications

References 8 publications

Low Temperature Acoustic Properties of Amorphous Silica and the Tunneling Model

Low Temperature Acoustic Properties of Amorphous Silica and the Tunneling Model

Magnetoresistance of RuO2-based resistance thermometers below 0.3 K

Field-orientation dependent heat capacity measurements at low temperatures with a vector magnet system

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