Magnetovolume effects in Fe80-xNixCr20 alloys |
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| Institution: | 1. School of Agriculture and Food, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Victoria 3010, Australia;2. Soil Physics and Land Management Group, Wageningen University & Research, Droevendaalsesteeg 4, 6708PB Wageningen, The Netherlands;3. Agroecologia, El Colegio de la Frontera Sur, Unidad Campeche Av Polígono s/n, Cd. Industrial, Lerma, Campeche, Mexico;4. CSIRO Manufacturing, Bayview Avenue, Clayton 3168, Victoria, Australia |
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| Abstract: | Temperature and magnetic field dependences of the thermal expansion between 4 and 300 K and in fields up to 6 T were made on Fe80-xNixCr20 for 14⩽x⩽49 at%. This concentration range covered the regions in which the samples were antiferromagnetic, paramagnetic and ferromagnetic as well as spin glass and reentrant spin glass at low temperatures. We develop a method of determining the lattice contribution to the thermal expansion for such systems showing mixed magnetic behavior and analyze the present data accordingly. We find in ferromagnetic samples large magnetic contributions to the thermal expansion even at temperatures much higher than the Curie temperature. The field dependence of the lenght change shows behavior which is characteristic of the magnetic state of the system. |
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