301 research outputs found
Pressure-induced changes in the magnetic and valence state of EuFe2As2
We present the results of electrical resistivity, ac specific heat, magnetic
susceptibility, X-ray absorption spectroscopy (XAS) and X-ray magnetic circular
dichroism (XMCD) of the ternary iron arsenide EuFe2As2 single crystal under
pressure. Applying pressure leads to a continuous suppression of the
antiferromagnetism associated with Fe moments and the antiferromagnetic
transition temperature becomes zero in the vicinity of a critical pressure Pc
~2.5-2.7 GPa. Pressure-induced re-entrant superconductivity, which is highly
sensitive to the homogeneity of the pressure, only appears in the narrow
pressure region in the vicinity of Pc due to the competition between
superconductivity and the antiferromagnetic ordering of Eu2+ moments. The
antiferromagnetic state of Eu2+ moments changes to the ferromagnetic state
above 6 GPa. We also found that the ferromagnetic order is suppressed with
further increasing pressure, which is connected with a valence change of Eu
ions.Comment: 7 pages, 7 figures, accepted for publication in Phys. Rev.
Study of 12C(3He,n)14O Reaction at 45 MeV
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Excitation Functions of the 164Dy(p,xn) Reactions
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Nuclear g-Factor of the 275.4-keV 5- Isomeric State in 212At
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Nitrogen Acceleration with a Cold Cathode Type PIG Ion Source
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Nuclear g-Factor of the 2972 keV Isomer in 130Xe
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Construction of a Single-Wire Position-Sensitive Proportional Counter for Magnetic Analysis of Low Energy Electrons
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The 12C(3He,n)14O Reaction at 45.5 MeV
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The 26Mg(3He,n) 28Si Reaction at 23.1, 45.5 and 64.6 MeV
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