Evidence of superconductivity on the border of quasi-2D ferromagnetism in Ca2RuO4 at high pressure

Evidence of superconductivity on the border of quasi-2D ferromagnetism in Ca2RuO4 at high pressure

The layered perovskite Ca(2)RuO(4) is a spin-one Mott insulator at ambient pressure and exhibits metallic ferromagnetism at least up to ∼ 80 kbar with a maximum Curie temperature of 28 K. Above ∼ 90 and up to 140 kbar, the highest pressure reached, the resistivity and ac susceptibility show pronounc...

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Veröffentlicht in:Journal of physics. Condensed matter 2010-02, Vol.22 (5), p.052202-052202
Hauptverfasser: Alireza, Patricia Lebre, Nakamura, Fumihiko, Goh, Swee Kuan, Maeno, Yoshiteru, Nakatsuji, Satoru, Ko, Yuen Ting Chris, Sutherland, Michael, Julian, Stephen, Lonzarich, Gilbert George
Format: Artikel
Sprache:eng
Schlagworte:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Magnetic properties
Physics
Properties of type I and type II superconductors
Superconductivity
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Zusammenfassung:The layered perovskite Ca(2)RuO(4) is a spin-one Mott insulator at ambient pressure and exhibits metallic ferromagnetism at least up to ∼ 80 kbar with a maximum Curie temperature of 28 K. Above ∼ 90 and up to 140 kbar, the highest pressure reached, the resistivity and ac susceptibility show pronounced downturns below ∼ 0.4 K in applied magnetic fields of up to ∼ 10 mT. This indicates that our specimens of Ca(2)RuO(4) are weakly superconducting on the border of a quasi-2D ferromagnetic state.
ISSN:0953-8984
1361-648X
DOI:10.1088/0953-8984/22/5/052202