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Magnetic switching and magnetic transitions in ErCo2 probed by radio-frequency transverse susceptibility

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9 Author(s)
Figueroa, A.I. ; Functional Materials Laboratory, University of South Florida, Tampa, Florida 33620 USA ; Chandra, S. ; Phan, M.H. ; Srikanth, H.
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ErCo2 represents a typical example of magnetism of itinerant electron systems and metamagnetic processes and has been the subject of extensive research. We present here the first study of radio-frequency transverse susceptibility (TS) of bulk ErCo2 using a self-resonant tunnel-diode oscillator technique. TS measurements reveal the collective magnetic switching of the Er moments at temperatures below the ferrimagnetic transition temperature, Tc∼32 K, and the existence of Co nanoclusters with short-range correlations at Tc<T<Tf (Tf denoted as the flipping temperature). The difference in the magnetic configuration between the ferrimagnetic, parimagnetic, and paramagnetic states, as well as the change from the paramagnetic to parimagnetic regime upon varying dc magnetic fields are also probed by TS experiments. These findings are discussed in the context of our previous investigations using other different techniques which provide further insights into the magnetism and the so-called parimagnetism phenomenon in ErCo2.

Published in:

Journal of Applied Physics  (Volume:109 ,  Issue: 7 )