Electrothermal Instabilities at Magnetic Critical Points
Characteristic oscillations in the vicinity of magnetic ordering temperatures are explained in terms of the continuously forced ballast resistor model. Because of the highly non linear (I–V) characteristics in the vicinity of the critical temperature, the sample splits into various temperature domains. The “thermal grain boundary” velocity is a sensitive function of the temperature derivative of the Seebeck coefficient (which diverges near the critical point).
KeywordsCritical Temperature Seebeck Coefficient Thermoelectric Power Instability Condition Temperature Derivative
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