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- W2247147324 abstract "The interesting anisotropic magnetocaloric effect (MCE) observed in the quaternary EuRhAl4Si2 single crystalline sample has been studied by measuring the isothermal magnetization in applied magnetic fields. EuRhAl4Si2, crystallizes in the tetragonal crystal structure and orders antiferromagnetically at ~12 K. The isothermal magnetization along the two principle directions is highly anisotropic despite Eu2+ being an S-state ion which lacks crystal electric field anisotropy to the first order. The variation of entropy change, which is a measure of magnetocaloric effect, with field and temperature, calculated from the isothermal magnetization data taken at various temperatures along the principal crystallographic directions present interesting physical properties in this compound. In the magnetically ordered state the entropy change is highly nonlinear below spin flip fields; however in the paramagnetic region, it is negative irrespective of the strength of applied magnetic field. From iso-field data, for H // [100], entropy change is initially positive before a crossover temperature of 7-10 K for fields 2T-7T, reaching a maximum of -16 J/Kg K at 12 K. For H // [001] the observed maximum entropy change at 7 T is -21 J/Kg K, which is large and comparable to the largest known values in this temperature range. The variation of the entropy vs. field plots strongly depends upon the direction of the applied magnetic field." @default.
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- W2247147324 date "2015-07-21" @default.
- W2247147324 modified "2023-09-23" @default.
- W2247147324 title "Sign reversal and non-monotonic magnetocaloric effect in EuRhAl4Si2" @default.
- W2247147324 hasPublicationYear "2015" @default.
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