Search for the muon-stopping sites in rare-earth orthoferites [i.e. orthoferrites] by means of dipolar calculation

dc.creatorLin, Tsai-ku
dc.date.available2011-02-18T19:12:03Z
dc.date.issued1986-08
dc.degree.departmentPhysicsen_US
dc.description.abstractThe uSR data for RFe03 (R=Er, Ho, Y, Dy, Eu and Sm) indicates that three separate localized muon sites may exist. In Ref.(12) one of these sites lying in the R-0 plane of the perovskite structure was identified, hereafter referred to as the Holzschuh-1 site. We have performed dipole sum calculations of the internal fields in the orthoferrites for the magnetic orderings present within the series. Using a weighting scheme requiring a match to the experimental values for the magnitude and directions of internal fields from observed uSR signals, and a muon-oxygen distance consistent with bond formation, we have verified the Holzschuh-1 site and have identified two additional muon-oxygen bonding sites. The three sites thus located provide a satisfactory explanation for all of the uSR signals reported in the orthoferrite series. The two newly identified sites, which we have called "Holzschuh-2 and Hofmann sites" are associated with the corner oxygen of the rare-earth oxygen plane in the pseudolattice picture (Fe=origin). At higher temperatures, increased muon motion results in migration of muons to the more stable Holzschuh-1 site, so that only one signal is seen.
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/2346/9823en_US
dc.language.isoeng
dc.publisherTexas Tech Universityen_US
dc.rights.availabilityUnrestricted.
dc.subjectOrthoferritesen_US
dc.subjectMuonsen_US
dc.subjectMuon spin rotationen_US
dc.titleSearch for the muon-stopping sites in rare-earth orthoferites [i.e. orthoferrites] by means of dipolar calculation
dc.typeThesis
thesis.degree.departmentPhysics
thesis.degree.disciplinePhysics
thesis.degree.grantorTexas Tech University
thesis.degree.levelMasters
thesis.degree.nameM.S.

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