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.
Tuning of competing magnetic and superconducting phase volumes in LaFeAsO0.945F0.055 by hydrostatic pressure / Khasanov, R.; Sanna, Samuele; Prando, G.; Shermadini, Z.; Bendele, M.; Amato, A.; Carretta, P.; De Renzi, R.; Karpinski, J.; Katrych, S.; Luetkens, H.; Zhigadlo, N. D.. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - STAMPA. - 84:(2011), pp. 100501.1-100501.5. [10.1103/PhysRevB.84.100501]
Tuning of competing magnetic and superconducting phase volumes in LaFeAsO0.945F0.055 by hydrostatic pressure
SANNA, SAMUELE;
2011
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
