de.mpg.escidoc.pubman.appbase.FacesBean
Deutsch
 
Hilfe Wegweiser Impressum Kontakt Einloggen
  DetailsucheBrowse

Datensatz

DATENSATZ AKTIONENEXPORT

Freigegeben

Zeitschriftenartikel

Magnetic and superconducting properties of Ir-doped EuFe2As2

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons126614

Geibel,  C.
Christoph Geibel, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons126660

Hossain,  Z.
Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

Externe Ressourcen
Es sind keine Externen Ressourcen verfügbar
Volltexte (frei zugänglich)
Es sind keine frei zugänglichen Volltexte verfügbar
Ergänzendes Material (frei zugänglich)
Es sind keine frei zugänglichen Ergänzenden Materialien verfügbar
Zitation

Paramanik, U. B., Paulose, P. L., Ramakrishnan, S., Nigam, A. K., Geibel, C., & Hossain, Z. (2014). Magnetic and superconducting properties of Ir-doped EuFe2As2. Superconductor Science and Technology, 27(7): 075012, pp. 1-7. doi:10.1088/0953-2048/27/7/075012.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-001A-1A57-E
Zusammenfassung
The magnetic and superconducting properties of 14% Ir-doped EuFe2As2 are studied by means of dc and ac magnetic susceptibilities, electrical resistivity, specific heat and Eu-151 and Fe-57 M ssbauer spectroscopy (MS) measurements. Doping of Ir in EuFe2As2 suppresses the Fe spin density wave transition and in turn gives rise to high temperature superconductivity below 22.5 K with a reentrant feature at lower temperature. Magnetization and Eu-151 M ssbauer data indicate that the Eu2+ spins order magnetically below 18 K. Fe-57 MS studies show a line broadening in the absorption spectra below 18 K due to transferred hyperfine field from the magnetically ordered Eu sublattices. A pronounced lambda-shape peak in the specific heat supports a second-order phase transition of Eu2+ magnetic ordering with a strong ferromagnetic component, as confirmed by the magnetic field dependences of the transition. For a single crystal, the in-plane resistivity (p(ab)) ab and out-of-plane susceptibility (chi(c)) show superconducting transitions with zero resistance and diamagnetism, respectively. But the in-plane susceptibility (chi(ab)) does not show any diamagnetic shielding against external fields. The observed non-zero resistance in the temperature range 10-17.5 K, below the superconducting transition temperature, suggests the possible existence of a spontaneous vortex state in this superconductor.