Demagnetization experiments on some promising new compounds for very low-temperature refrigeration
| Autor: | John B Ketterson, Pat R. Roach, E. R. Pfeiffer, Bernard M. Abraham |
|---|---|
| Rok vydání: | 1974 |
| Předmět: |
Phosphine oxide
chemistry.chemical_classification Materials science Thiocyanate Iodide Demagnetizing field Analytical chemistry chemistry.chemical_element Condensed Matter Physics Magnetic susceptibility Atomic and Molecular Physics and Optics Magnesium nitrate chemistry.chemical_compound Cerium Nuclear magnetic resonance chemistry General Materials Science Phosphine |
| Zdroj: | Journal of Low Temperature Physics. 14:387-396 |
| ISSN: | 1573-7357 0022-2291 |
| Popis: | We have performed demagnetization experiments on spherical specimens of silver chloride-bonded, compacted powders of four different compounds. Pure and lanthanum-diluted cerium magnesium nitrate (CMN) was studied along with two new compounds formed from cerium iodide and antipyrine and from cerium thiocyanate and triphenyl phosphine oxide. The magnetic temperaturesT* were determined from measurements of the magnetic susceptibility perpendicular to the axis of the initial magnetizing field. Both the lanthanum-diluted CMN and the triphenyl phosphine oxide compounds yielded significantly lower values ofT* than that obtained with CMN. The problem of thermal equilibrium within the demagnetized sample is considered. |
| Databáze: | OpenAIRE |
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