Top-loading small-sample calorimeters for measurements as a function of magnetic field angle

27th International Conference on Low Temperature Physics

Fortune, N.A.^1 ; Hannahs, S.T.^2

Department of Physics, Smith College, College Lane, Northampton

MA

01063, United States^1

National High Magnetic Field Laboratory, Florida State University, 1800 E. Paul Dirac Road, Tallahassee

FL

32310, United States^2

关键词: Applied magnetic fields;    Base temperature;    DC magnetic field;    Low-dimensional systems;    Magnetic field angle;    Magnetic field dependences;    Magnetic field orientations;    Temperature range;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/568/3/032008/pdf
DOI  :  10.1088/1742-6596/568/3/032008

来源: IOP

【 摘 要 】

In quasi-low-dimensional systems, the existence of a particular physical state and the temperature and magnetic-field-dependence of its phase boundary often strongly depends on magnetic field orientation. To investigate magnetic field orientation dependent phase transitions in these materials, we have developed rotatable miniature and sub-miniature sample-in-vacuum calorimeters that operate in dc magnetic fields up to 18 and 45 tesla. The calorimeters cover the temperature range from below 0.1 K to above 10 K; they are able rotate a full 360 degrees relative to the applied magnetic field while remaining at base temperature. Samples are typically on the order of 1 mg in mass and up to 2 mm2× 0.5 mm in volume.