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Tuning of competing magnetic and superconducting phase volumes in LaFeAsO_{0.945}F_{0.055} by hydrostatic pressure


Khasanov, R; Sanna, S; Prando, G; Shermadini, Z; Bendele, M; Amato, A; Carretta, P; De Renzi, R; Karpinski, J; Katrych, S; Luetkens, H; Zhigadlo, N (2011). Tuning of competing magnetic and superconducting phase volumes in LaFeAsO_{0.945}F_{0.055} by hydrostatic pressure. Physical Review B, 84(10):100501.

Abstract

The interplay between magnetism and superconductivity in LaFeAsO0.945F0.055 was studied as a function of hydrostatic pressure up to p≃2.4 GPa by means of muon-spin rotation (μSR) and magnetization measurements. The application of pressure leads to a substantial decrease of the magnetic ordering temperature, reduction of the magnetic phase volume and, at the same time, to a strong increase of the superconducting transition temperature and the diamagnetic susceptibility. From the volume-sensitive μSR measurements it can be concluded that the superconducting and the magnetic areas, coexisting in the same sample, are inclined toward spatial separation and compete for phase volume as a function of pressure.

Abstract

The interplay between magnetism and superconductivity in LaFeAsO0.945F0.055 was studied as a function of hydrostatic pressure up to p≃2.4 GPa by means of muon-spin rotation (μSR) and magnetization measurements. The application of pressure leads to a substantial decrease of the magnetic ordering temperature, reduction of the magnetic phase volume and, at the same time, to a strong increase of the superconducting transition temperature and the diamagnetic susceptibility. From the volume-sensitive μSR measurements it can be concluded that the superconducting and the magnetic areas, coexisting in the same sample, are inclined toward spatial separation and compete for phase volume as a function of pressure.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:2011
Deposited On:11 Nov 2011 09:37
Last Modified:05 Apr 2016 15:05
Publisher:American Physical Society
ISSN:1098-0121
Publisher DOI:https://doi.org/10.1103/PhysRevB.84.100501

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