The electrical resistivity of epitaxially deposited chromium films

Sawabu, Masaki; Ohashi, M.; Ohashi, K.; Miyagawa, Masahiro; Kubota, Takahide; Takanashi, Kōki

doi:10.1088/1742-6596/871/1/012002

Cited by 7 publications

(4 citation statements)

References 18 publications

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“…We note that there seems to be a linear relationship between temperature and input current for both locations. This is likely due to the complex interplay between three factors: (1) the nonlinear temperature-dependence of the resistivity of chromium, 35 (2) the heat exchange, at steady-state, between the microcircuit and the surrounding reservoir, 36 (3) Joule heating of the microcircuit. 37 The thermometer in Location 1 experienced consistently higher temperature than that from Location 2, which is consistent with its position on the edge of the microcircuit, rather than in its close proximity.…”

Section: Resultsmentioning

confidence: 99%

Ultralow-Power Cryogenic Thermometry Based on Optical-Transition Broadening of a Two-Level System in Diamond

et al. 2023

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Cryogenic temperatures are the prerequisite for many advanced scientific applications and technologies. The accurate determination of temperature in this range and at the submicrometer scale is, however, nontrivial. This is due to the fact that temperature reading in cryogenic conditions can be inaccurate due to optically induced heating. Here, we present an ultralowpower, optical thermometry technique that operates at cryogenic temperatures. The technique exploits the temperature-dependent linewidth broadening measured by resonant photoluminescence of a two-level system: a germanium-vacancy color center in a nanodiamond host. The proposed technique achieves a relative sensitivity of ∼20% K −1 , at 5 K. This is higher than any other alloptical nanothermometry method. Additionally, it achieves such sensitivities while employing excitation powers of just a few tens of nanowatts, several orders of magnitude lower than other traditional optical thermometry protocols. To showcase the performance of the method, we demonstrate its ability to accurately read out local differences in temperatures at various target locations of a custom-made microcircuit. Our work is a step toward the advancement of nanoscale optical thermometry at cryogenic temperatures.

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Section: Resultsmentioning

confidence: 99%

Ultralow-Power Cryogenic Thermometry Based on Optical-Transition Broadening of a Two-Level System in Diamond

et al. 2023

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“…As shown in Figure 1b, resistivity ρ increased further due to the disorder-induced scattering via spin fluctuation near T N . 32,33 Differential resistivity ρ with respect to T, i.e., dρ/dT, captured this enhancement clearly. Above 212 K, dρ/dT maintained a stable platform with a small slope.…”

mentioning

confidence: 87%

Observation of the Fluctuation Spin Hall Effect in a Low-Resistivity Antiferromagnet

Fang,

Wan,

Zhang

et al. 2023

Nano Lett.

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“…Thin films are used in many applications such as optoelectronic and photovoltaic systems [8,9], magnetic storage systems [10] or chemical biosensors [11]. Their electrical or magnetic properties change according to their preparation conditions [12], thickness of the films [5], substrates on which they are grown [3] and also aging [13]. Chromium (Cr), being the first metal investigated as a thin film resistor with no superconductivity even under pressure, and gold (Au), being a unique material with high chemical stability and electrical conductivity especially in porous form [14], gain attention from scientists and therefore, highly examined.…”

Section: Introductionmentioning

confidence: 99%

Examination of Film Thickness Dependence on Acoustic Impedance of Gold and Chromium Thin Films by Scanning Acoustic Microscopy

Bilen

2021

International Journal of Advances in Engineering and Pure Sciences

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Thickness induced changes in acoustic impedance of gold (Au) and chromium (Cr) thin films are studied with scanning acoustic microscopy (SAM). Thin films are produced by thermal evaporation technique on BK7 glass substrates with varying thicknesses between 40 nm to 200 nm. In acoustic impedance (AI) mode, the microscope generates two-dimensional acoustic impedance maps of the thin films and micrometer resolution helps determining the surface defects on these films. On the other hand, acoustic impedance value is found to increase as thickness increases for both Au and Cr thin films indicating increased elasticity, therefore, hardness. The acoustic impedance of Cr thin films were found as 1.901 ± 0.050 MRayl for 40 nm, 1.905 ± 0.045 MRayl for 80 nm, 1.943 ± 0.049 MRayl for 120 nm, 1.964 ± 0.049 MRayl for 160 nm and 1.987 ± 0.052 MRayl for 200 nm. The acoustic impedance of Au thin films were found as 1.725 ± 0.026 MRayl for 80 nm and 1.954 ± 0.047 MRayl for 200 nm. This success achieved by SAM, demonstrates its potential in monitoring thin film surfaces even with very small thicknesses.

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The electrical resistivity of epitaxially deposited chromium films

Cited by 7 publications

References 18 publications

Ultralow-Power Cryogenic Thermometry Based on Optical-Transition Broadening of a Two-Level System in Diamond

Ultralow-Power Cryogenic Thermometry Based on Optical-Transition Broadening of a Two-Level System in Diamond

Observation of the Fluctuation Spin Hall Effect in a Low-Resistivity Antiferromagnet

Examination of Film Thickness Dependence on Acoustic Impedance of Gold and Chromium Thin Films by Scanning Acoustic Microscopy

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