Thermal boundary resistance for gold and CoFe alloy on silicon nitride films

Jeong, Taehee; Zhu, Jian‐Gang; Chung, Suk Jae; Gibbons, M.

doi:10.1063/1.3703571

Cited by 12 publications

(11 citation statements)

References 25 publications

(27 reference statements)

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“…After the femtosecond laser pulse–induced locally equilibrated electron, spin, and lattice system, we described the transient thermal state of the Py disk using a simple single-temperature model in the picosecond time range ( 42 ). The relative heat capacities of the Py and silicon nitride layer were taken into account in the model, and the thermal conductivity (~25 W/mK) of the Py was taken from ( 56 ), while the thermal boundary resistance between the two layers was estimated from ( 57 ). At a laser fluence of 12 mJ/cm 2 (above the threshold), the Py disk was initially heated up to a transient peak temperature exceeding the Curie point and then the system cooled down rapidly through the local equilibration between the Py disk and the silicon nitride substrate with a cooling rate of up to ~10 12 K/s, followed by subsequent thermal diffusion through the substrate.…”

Section: Methodsmentioning

confidence: 99%

Optical manipulation of magnetic vortices visualized in situ by Lorentz electron microscopy

Pollard

Chen

et al. 2018

Sci. Adv.

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Section: Methodsmentioning

confidence: 99%

Optical manipulation of magnetic vortices visualized in situ by Lorentz electron microscopy

Pollard

Chen

et al. 2018

Sci. Adv.

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“…It is clear from equation (1) that decreasing the thermal resistance between thermal sensor and NW as well as contact resistances, whereas increasing the resistance to the environment, improves the sensitivity of SThM to the samples of wider thermal conductivities range. Therefore, NW and contact resistances [20,27] must be reduced as much as possible to increase the precision of the SThM measurements.…”

Section: Analytical Model Of the Sthm Probementioning

confidence: 99%

“…One of the possible solutions proposed elsewhere [4,5,20,21] suggests to use a high thermal conductivity and nanometre scale cross-section probe at the apex of the tip (e.g. nanowire (NW) or multiwall carbon nanotube (MWCNT), a particular example of NW) to act as a nanometre scale thermal link between the sensor and the sample [21,22].…”

Section: Introductionmentioning

confidence: 99%

“…Unfortunately, most thermal measurement systems are based on optical methods, such as IR thermal emission, Raman spectroscopy or photoreflectance with the spatial resolution limited to 500 nm or greater [10][11][12]. The promising technique for nanoscale thermal measurements is Scanning Thermal Microscopy (SThM) [13][14][15][16][17][18], that while showing good performance in studies of polymeric and organic materials, has limited ability to differentiate between high thermal conductivity materials such as used in the semiconductor industry, thermoelectrics or optical devices [19,20]. The main reasons are -spatial resolution on the range of few tens of nanometres remains well below other scanning probe microscopy (SPM) approaches, low sensitivity to thermal properties of materials of high thermal conductance, worsened by the unstable and weak thermal contact between the thermal sensor and the studied object.…”

Section: Introductionmentioning

confidence: 99%

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Scanning thermal microscopy with heat conductive nanowire probes

et al. 2016

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(2016) 'Scanning thermal microscopy with heat conductive nanowire probes.', Ultramicroscopy., 162 . pp. 42-51.Further information on publisher's website:http://dx.doi.org/10. 1016/j.ultramic.2015.12.006 Publisher's copyright statement: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. AbstractScanning thermal microscopy (SThM), which enables measurement of thermal transport and temperature distribution in devices and materials with nanoscale resolution is rapidly becoming a key approach in resolving heat dissipation problems in modern processors and assisting development of new thermoelectric materials. In SThM, the self-heating thermal sensor contacts the sample allowing studying of the temperature distribution and heat transport in nanoscaled materials and devices. The main factors that limit the resolution and sensitivities of SThM measurements are the low efficiency of thermal coupling and the lateral dimensions of the probed area of the surface studied. The thermal conductivity of the sample plays a key role in the sensitivity of SThM measurements. During the SThM measurements of the areas with higher thermal conductivity the heat flux via SThM probe is increased compared to the areas with lower thermal conductivity. For optimal SThM measurements of interfaces between low and high thermal conductivity materials, well defined nanoscale probes with high thermal conductivity at the probe apex are required to achieve a higher quality of the probe-sample thermal contact while preserving the lateral resolution of the system.In this paper, we consider a SThM approach that can help address these complex problems by using high thermal conductivity nanowires (NW) attached to a tip apex.We propose analytical models of such NW-SThM probes and analyse the influence of the contact resistance between the SThM probe and the sample studied. The latter becomes particularly important when both tip and sample surface have high thermal conductivities.2 These models were complemented by finite element analysis simulations and experimental tests using prototype probe where a multiwall carbon nanotube (MWCNT) is exploited as an excellent example of a high thermal conductivity NW. These results elucidate critical relationships between the performance of the SThM probe on one hand and thermal conductivity, geometry of the probe and its components on the other. As such, they provide a pathway for optimizing current SThM for nanothermal studies of high thermal conductivity materials. Comparison between experimental and modelling results allows...

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“…The thermal properties of the materials are taken from the literature: [31], and k tape =1.4 W/mK [32]. The thermal contact resistance between the thin films (SiN x /Si, Au/Cr/SiN x ) are on the order of 10 -8 m 2 K/W [33,34], and are insignificant compared to the resistance of the adhesive tape (∼ 10 -3 m 2 K/W) itself. The contact resistance on either side of the adhesive tape are also assumed to be negligible [35].…”

Section: Calibrationmentioning

confidence: 99%

Fabrication and characterization of thermocouple probe for use in intracellular thermometry

Rajagopal

Valavala

Gelda

et al. 2018

Sensors and Actuators A: Physical

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Measuring temperatures within a biological cell requires a sensor with small thermal mass and microscale or smaller size that is electrically and chemically inert to the cell's environment, and is thermally isolated from the surroundings. We investigate how such requirements can be satisfied in a microscale thermocouple probe that is fabricated using the techniques of silicon-based microelectromechanical systems. Previous reports of invasive probes lacked either the required spatial resolution (< 5 µm) or response time (< 4 ms). Here, we report 1 µm thick silicon nitride supported probes with a 5 µm tip that has a response time of 32 µs. These figures enable future transient thermometry of cell organelles. To reduce calibration errors, we devise an on-chip calibration in a vacuum cryostat. We find that the accuracy of our measurements is ±54 mK for 300 ± 10 K. This work paves the way toward future thermometry at a subcellular level.

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Thermal boundary resistance for gold and CoFe alloy on silicon nitride films

Cited by 12 publications

References 25 publications

Optical manipulation of magnetic vortices visualized in situ by Lorentz electron microscopy

Optical manipulation of magnetic vortices visualized in situ by Lorentz electron microscopy

Scanning thermal microscopy with heat conductive nanowire probes

Fabrication and characterization of thermocouple probe for use in intracellular thermometry

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