Paradoxical Magnetic Cooling in a Structural Transition Model
In contrast to the experimentally widely used isentropic demagnetization process for cooling to ultra-low temperatures we examine a particular classical model system that does not cool, but rather heats up with isentropic demagnetization. This system consists of several magnetite particles in a coll...
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| Veröffentlicht in: | arXiv.org 2001-02 |
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| creator | Borrmann, Peter Stamerjohanns, Heinrich Hilf, Eberhard R Tomanek, David |
| description | In contrast to the experimentally widely used isentropic demagnetization process for cooling to ultra-low temperatures we examine a particular classical model system that does not cool, but rather heats up with isentropic demagnetization. This system consists of several magnetite particles in a colloidal suspension, and shows the uncommon behavior of disordering structurally while ordering magnetically in an increasing magnetic field. For a six-particle system, we report an uncommon structural transition from a ring to a chain as a function of magnetic field and temperature. |
| doi_str_mv | 10.48550/arxiv.0009048 |
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| subjects | Demagnetization Magnetic cooling Magnetic fields Magnetism |
| title | Paradoxical Magnetic Cooling in a Structural Transition Model |
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