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  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 61 (1987), S. 3374-3376 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Eu compounds at or near the strongly magnetic (J=7/2) Eu2+ valence should enter a mixed valent Eu2+δ (||δ||〈1) nonmagnetic state at sufficiently high pressures. We have performed high pressure (P≤250 kbars) and low temperature (T≥4.2 or 77 K) resistivity measurements on semiconducting EuO and metallic Eu(AuxPd1−x)2Si2 (0≤x≤1). For EuO our results show a nonlinear gap variation above 130 kbar with a hybridization gap and ferromagnetism (Tc ≥200 K) being maintained out to 250 kbars. In the Eu(Au,Pd)2Si2 system the cooperative valence transition can be traced to higher pressures with increasing Au content. In the pure Au the magnetic order persists out to 250 kbars. A common theme in both systems is the substantial pressure-induced enhancement of the magnetic ordering temperature precursive to the eventual large Eu valence change.
    Type of Medium: Electronic Resource
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