The antiferromagnetic manganite Pr0.5Sr0.5-MnO3 was investigated at low temperature by means of magnetometry and 55Mn NMR. A field-induced transition to a ferromagnetic state is detected by magnetization measurements at a threshold field of a few tesla. NMR shows that the ferromagnetic phase develops from zero field by the nucleation of microscopic ferromagnetic domains, consisting of an inhomogeneous mixture of tilted and fully aligned parts. At the threshold the NMR spectrum changes discontinuously into that of a homogeneous, fully aligned, ferromagnetic state, suggesting a percolative origin for the ferromagnetic transition.
Field-induced segregation of ferromagnetic nanodomains in Pr0.5Sr0.5MnO3 detected by 55Mn NMR / Allodi, Giuseppe; DE RENZI, Roberto; Solzi, Massimo; Kamenev, K.; Balakrishnan, G.; Pieper, M. W.. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - 61:9(2000), pp. 5924-5927. [10.1103/PhysRevB.61.5924]
Field-induced segregation of ferromagnetic nanodomains in Pr0.5Sr0.5MnO3 detected by 55Mn NMR
ALLODI, Giuseppe;DE RENZI, Roberto;SOLZI, Massimo;
2000-01-01
Abstract
The antiferromagnetic manganite Pr0.5Sr0.5-MnO3 was investigated at low temperature by means of magnetometry and 55Mn NMR. A field-induced transition to a ferromagnetic state is detected by magnetization measurements at a threshold field of a few tesla. NMR shows that the ferromagnetic phase develops from zero field by the nucleation of microscopic ferromagnetic domains, consisting of an inhomogeneous mixture of tilted and fully aligned parts. At the threshold the NMR spectrum changes discontinuously into that of a homogeneous, fully aligned, ferromagnetic state, suggesting a percolative origin for the ferromagnetic transition.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
