The orientation-effect of exchange bias on giant magnetoimpedance in surface crystallized Co66Fe4B15Si15 amorphous ribbons |
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| Authors: | Yoon S S Buznikov N A Kim D Y Kim C O Kim C G |
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| Institution: | (1) Laboratorium für Festkörperphysik, ETH-Hönggerberg, 8093 Zürich, Switzerland;(2) National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32306, USA;(3) Department of Physics, University of California - Davis, Davis, CA 95616, USA |
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| Abstract: | We report the results of measurements of the
low-temperature specific heat Cp(T) and the ac susceptibility
χac(T) in low applied magnetic fields for a series of
samples of Eu1-xCaxB6. The anomalies in Cp(T),
together with the results for χac(T) and M(H), confirm
the onset of phase transitions to long range magnetic order for
x < 0.7 and provide evidence that for x ≥ 0.7, the Eu
moments, which are captured in large magnetic clusters with
magnetic moments of the order of 260 μB, adopt a spin-glass
type ground state. The data set allows to establish the
low-temperature T,x] phase diagram of this alloy series. |
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