Effect of pressure on the physical properties of EuFe2As2
Creators
- 1. Institute for Solid State Physics, University of Tokyo, Chiba (Japan)
- 2. Japan Synchrotron Radiation Research Institute, Hyogo (Japan)
- 3. Department of Physical Science, Graduate School of Science, Hiroshima University, Hiroshima (Japan)
- 4. Faculty of Science, University of the Ryukyus, Okinawa (Japan)
- 5. Department of Physics, Faculty of Engineering, Yokohama National University, Yokohama (Japan)
Description
In the oxygen-free iron arsenide AFe2As2 (A = Ca, Sr, Ba, Eu) with the FeAs layers tetragonal structure, the antiferromagnetism of Fe moments is suppressed by chemical doping or applying pressure, and superconductivity appears above a critical concentration and pressure. Among the AFe2As2 compounds, EuFe2As2 offers an unique opportunity to study an interplay between the superconductivity and magnetism of both Eu and Fe ions. As for the competition between the superconductivity and magnetism of Eu ions, it would be also rewarding to extend the pressure range to higher pressure because sufficiently high pressure induces the valence change from Eu+2 (4f7, magnetic) to Eu3+ (4f6, non-magnetic) state, which may be more favorable for the appearance of superconductivity. In order to clarify these points and construct the phase diagram in the wider pressure range, we have measured electrical resistivity, ac specific heat, magnetic susceptibility, X-ray absorption spectroscopy (XAS) and X-ray magnetic circular dichroism (XMCD) up to 23 GPa
Additional details
Publishing Information
- Publisher
- Bhabha Atomic Research Centre
- Imprint Place
- Mumbai (India)
- Imprint Title
- Proceedings of the international conference on high pressure science and technology: abstracts
- Imprint Pagination
- 416 p.
- Journal Page Range
- p. 63
Conference
- Title
- 23. international conference on high pressure science and technology
- Acronym
- AIRAPT-23
- Dates
- 25-30 Sep 2011
- Place
- Mumbai (India)
INIS
- Country of Publication
- India
- Country of Input or Organization
- India
- INIS RN
- 43031937
- Subject category
- S36: MATERIALS SCIENCE;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- ANTIFERROMAGNETISM; EUROPIUM COMPOUNDS; MAGNETIC SUSCEPTIBILITY; PHASE DIAGRAMS; PRESSURE DEPENDENCE; SPECIFIC HEAT; SUPERCONDUCTIVITY
- Descriptors DEC
- DIAGRAMS; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; INFORMATION; MAGNETIC PROPERTIES; MAGNETISM; PHYSICAL PROPERTIES; RARE EARTH COMPOUNDS; THERMODYNAMIC PROPERTIES
Optional Information
- Notes
- 1 fig.