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Thermodynamic investigations in the precursor region of FeGe

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arxiv 1208.5646 v1 pith:JCAESJPK submitted 2012-08-28 cond-mat.str-el

Thermodynamic investigations in the precursor region of FeGe

classification cond-mat.str-el
keywords datamagneticfegephaseregiona-phasediagrammagnetization
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High-resolution DC magnetization and AC-specific heat data of the cubic helimagnet FeGe have been measured as function of temperature and magnetic field. The magnetization data as well as the isothermal susceptibility data confirm the complexity of the magnetic phase diagram in the vicinity of the onset of long-rang magnetic order (Tc = 278.5 K) and the existence of a segmented A-phase region. Moreover, these data revealed independent and clear indications of phase boundaries and crossovers within the A-phase region. Together with the anomalies in the specific-heat data around Tc and at small magnetic fields (H < 600 Oe) a complex magnetic phase diagram of FeGe is obtained.

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