Muon-spin-relaxation studies of magnetic order in heavily doped La2-xSrxNiO4+ delta.

Muon-spin-relaxation studies of magnetic order in heavily doped La2-xSrxNiO4+ delta.

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We report muon-spin-relaxation measurements on a series of compounds with composition La2-xSrxNiO4+δ where the net hole concentration x+2δ is greater than 0.4. A magnetic transition is found in all the samples studied which occurs at a composition-dependent temperature TM. Below TM clear precession...

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מידע ביבליוגרפי
Main Authors: Chow, K, Pattenden, P, Blundell, S, Hayes, W, Pratt, F, Jestädt, T, Green, M, Millburn, J, Rosseinsky, M, Hitti, B, Dunsiger, SR, Kiefl, R, Chen, C, Chowdhury, A
פורמט: Journal article
שפה:English
יצא לאור: 1996
תיאור
סיכום:We report muon-spin-relaxation measurements on a series of compounds with composition La2-xSrxNiO4+δ where the net hole concentration x+2δ is greater than 0.4. A magnetic transition is found in all the samples studied which occurs at a composition-dependent temperature TM. Below TM clear precession signals are observed in zero applied magnetic field, indicating the existence of at least short-range magnetic order on a time scale greater than 10-8 s. Above TM the correlation times decrease by several orders of magnitude. The measurements of TM as a function of the net hole concentration extend the determination of Néel temperatures by previous neutron diffraction measurements to higher doping levels.

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