Volume 98, Number 3, May 2012
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||10 May 2012|
Conductivity and incommensurate antiferromagnetism of Fe1.02Se0.10Te0.90 under pressure
Department of Physics, University of Virginia, 382 McCormick Road - Charlottesville, VA 22904, USA
2 The Institute for Solid State Physics, University of Tokyo - Kashiwa, Chiba 277-8581, Japan
3 Department of Applied Physics, University of Tokyo - 7-3-1 Hongo, Bunkyo, Tokyo 113-8656, Japan
4 NIST Center for Neutron Research, National Institute of Standards and Technology - Gaithersburg, MD 20899, USA
5 Department of Materials Science and Engineering, University of Maryland - College Park, MD 20742, USA
6 Advanced Institute for Materials Research, Tohoku University - Sendai 980-8577, Japan
Accepted: 11 April 2012
By performing resistivity, bulk susceptibility and neutron diffraction on single crystals of Fe1.02Se0.10Te0.90 under pressure, we show that an external pressure can enhance both conductivity and magnetism simultaneously. Surprisingly, the pressure-induced magnetic order is nearly three-dimensional, and incommensurate along both the c-axis and the a-axis, which is accompanied by a structural phase separation. Our powder neutron diffraction data show that the Fe(Se, Te)4 tetrahedron becomes more regular under pressure, which is consistent with the enhancement of the metallicity but is counterintuitive to the three-dimensional magnetic order.
PACS: 74.70.Xa – Pnictides and chalcogenides / 81.30.Bx – Phase diagrams of metals, alloys, and oxides / 75.50.Ee – Antiferromagnetics
© EPLA, 2012
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