4 K to 20 K rotational-cooling magnetic refrigerator capable of 1-mW to >1-W operation
The low-temperature, magnetic entropy of certain single-crystal paramagnetic materials, such as DyPO/sub 4/, changes dramatically as the crystal rotates in a magnetic field. A new magnetic refrigerator design based on the anisotropic nature of such materials is presented. The key advantages of the rotational-cooling concept are (1) a single, rotary motion is required, (2) magnetic field shaping is not a problem because the entire working material is in a constant field, and (3) the refrigerator can be smaller than comparable magnetic refrigerators because the working material is entirely inside the magnet at all times. The main disadvantage of the rotational-cooling concept is that small-dimension single crystals are required.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 5709696
- Report Number(s):
- LA-8111; TRN: 80-005225
- Country of Publication:
- United States
- Language:
- English
Similar Records
Rotating Carnot-cycle magnetic refrigerators for use near 2 K
Magnetic and magnetocaloric properties of La{sub 0.85}(Na{sub 1−x}K{sub x}){sub 0.15}MnO{sub 3} ceramics produced by reactive spark plasma sintering
Related Subjects
GENERAL PHYSICS
DYSPROSIUM PHOSPHATES
THERMODYNAMIC PROPERTIES
MAGNETIC REFRIGERATORS
DESIGN
MATERIALS
PERFORMANCE
BERYLLIUM COMPOUNDS
CRYSTALS
GOLD COMPOUNDS
GRAPHS
HOLMIUM COMPOUNDS
MAGNETIC FIELDS
OPERATION
PARAMAGNETISM
TERBIUM COMPOUNDS
THEORETICAL DATA
THULIUM COMPOUNDS
ULTRALOW TEMPERATURE
ALKALINE EARTH METAL COMPOUNDS
APPLIANCES
DATA
DATA FORMS
DYSPROSIUM COMPOUNDS
ELECTRIC APPLIANCES
GAS APPLIANCES
INFORMATION
MAGNETISM
NUMERICAL DATA
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
REFRIGERATING MACHINERY
REFRIGERATORS
TRANSITION ELEMENT COMPOUNDS
420201* - Engineering- Cryogenic Equipment & Devices