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We report on the design, fabrication, and implementation of ultrasensitive micromechanical oscillators. Our ultrathin single-crystal silicon cantilevers with integrated magnetic structures are the first of their kind: They are fabricated…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 Michelle D. Chabot , John M. Moreland , Lan Gao , Sy-Hwang Liou , Casey W. Miller

Phase-separated magnetic fluids provide a very strong magnetic response ($\mu>25$) in a liquid state material. Even small fields can cause a notable material response, but this depends on its properties, which are often difficult to…

Soft Condensed Matter · Physics 2024-05-10 Laura Nelsone , Guntars Kitenbergs

In most systems, thermal diffusion is intrinsically slow with respect to mechanical relaxation. We devise here a generic approach to accelerate the relaxation of the temperature field of a 1D object, in order to beat the mechanical time…

Applied Physics · Physics 2023-03-23 Basile Pottier , Carlos Plata , Emmanuel Trizac , David Guéry-Odelin , Ludovic Bellon

We present a superconducting microresonator thermometer based on two-level systems (TLS) that is drop-in compatible with cryogenic microwave systems. The operational temperature range is 50-1000~mK (which may be extended to 5~mK), and the…

Instrumentation and Detectors · Physics 2020-11-16 J. Wheeler , M. R. Vissers , M. Malnou , J. Hubmayr , J. N. Ullom , J. Gao

We describe a simple AC susceptometer built in-house that can be used to make high-resolution measurements of the magnetic susceptibility of high-temperature superconductors in an undergraduate physics lab. Our system, cooled using liquid…

Physics Education · Physics 2021-12-24 Zhongda Huang , Yihang Tong , Jake S. Bobowski

Primary power standards in the microwave domain are realized using a calorimetric technique, usually identified with the used measurement system, i.e., the microcalorimeter. It is adjusted for measurement of power ratios with a relative…

Instrumentation and Detectors · Physics 2021-03-09 L. Brunetti , L. Oberto

We describe a simple and accurate differential thermal analysis set up to measure the latent heat of solid state materials undergoing abrupt phase transitions in the temperature range from 77 K to above room temperature. We report a…

Statistical Mechanics · Physics 2021-10-12 Tapas Bar , Bhavtosh Bansal

We report specific heat measurements on a high quality single crystal of the heavy-fermion compound CePt$_2$In$_7$ in magnetic fields up to 27 T. The zero-field specific heat data above the N\'{e}el temperature, $T_N$, suggest a moderately…

Strongly Correlated Electrons · Physics 2016-02-23 Y. Krupko , A. Demuer , S. Ota , Y. Hirose , R. Settai , I. Sheikin

We introduce a calorimetric approach to probe persistent currents in normal metal rings. The heat capacity of a large ensemble of silver rings is measured by nanocalorimetry under a varying magnetic field at different temperatures (60 mK,…

Mesoscale and Nanoscale Physics · Physics 2015-06-12 Germain Souche , Julien Huillery , H. Pothier , Philippe Gandit , Jerome I. Mars , Sergey Skipetrov , Olivier Bourgeois

This paper reports specific-heat measurements on superconducting MgB2 in magnetic fields to 9 T. In zero magnetic field the data can be fitted to a two-gap model, which is a generalization of a semi-empirical model for strong-coupled,…

Superconductivity · Physics 2007-05-23 R. A. Fisher , F. Bouquet , N. E. Phillips , D. G. Hinks , J. D. Jorgensen

We characterised a TES-based X-ray microcalorimeter in an adiabatic demagnetisation refrigerator (ADR) using synchrotron radiation. The detector response and energy resolution was measured at the beam-line in the PTB radiometry laboratory…

The readout electronics of a Micromegas (MM) module consume nearly 26 W of electric power, which causes the temperature of electronic board to increase upto $70\,^{\circ}{\rm C}$. Increase in temperature results in damage of electronics.…

Reflection measurements give access to the complex impedance of a material on a wide frequency range. This is of interest to study the dynamical properties of various materials, for instance disordered superconductors. However reflection…

Instrumentation and Detectors · Physics 2015-06-17 P. Diener , F. Couëdo , C. Marrache-Kikuchi , M. Aprili , J. Gabelli

We present the technical details of a broadband microwave spectrometer for measuring the complex conductance of thin films covering the range from 50 MHz up to 16 GHz in the temperature range 300 mK to 6 K and at applied magnetic fields up…

Instrumentation and Detectors · Physics 2015-06-18 Wei Liu , LiDong Pan , N. P. Armitage

Specific-heat measurements are reported near the Curie temperature ($T_C$~= 320 K) on tri-glycine sulfate. Measurements were made on crystals whose surfaces were either non-grounded or short-circuited, and were carried out in magnetic…

Statistical Mechanics · Physics 2008-11-26 J. C. Lashley , C. P. Opeil , T. R. Finlayson , R. A. Fisher , N. Hur , M. F. Hundley , B. Mihaila , J. L. Smith

The new NHMFL 60T quasi-continuous magnet produces a flat-top field for a period of 100 ms at 60 Tesla, and for longer time at lower fields, e.g. 0.5 sec at 35 Tesla. We have developed for the first time the capability to measure heat…

Strongly Correlated Electrons · Physics 2007-05-23 M. Jaime , R. Movshovich , J. L. Sarrao , J. Kim , G. Stewart , W. P. Beyerman , P. C. Canfield

This work builds on the previous introduction [1] of a coupled experimental-computational system devised to fully characterize the thermal behavior of complex 3D submicron electronic devices. The new system replaces the laser-based surface…

Materials Science · Physics 2007-09-13 Peter E. Raad , Pavel L. Komarov , M. Burzo

X-ray calorimetric sample platforms combining specific heat and synchrotron x-ray measurements provide a powerful means to investigate fundamental material properties. Calorimeter cell designs featuring a compact heater and thermometer…

Instrumentation and Detectors · Physics 2026-02-02 U. Patel , H. Zheng , J. L. McChesney , U. Welp , Z. Islam , A. Miceli

Magnetocaloric materials can be useful in magnetic refrigeration applications, but to be practical the magneto-refrigerant needs to have a very large magnetocaloric effect (MCE) near room temperature for modest applied fields (<2 Tesla)…

Cooling nanoelectronic devices below 10 mK is a great challenge since thermal conductivities become very small, thus creating a pronounced sensitivity to heat leaks. Here, we overcome these difficulties by using adiabatic demagnetization of…

Mesoscale and Nanoscale Physics · Physics 2018-01-18 M. Palma , C. P. Scheller , D. Maradan , A. V. Feshchenko , M. Meschke , D. M. Zumbühl