Single-Ion Anisotropy, Crystal-Field Effects, Spin Reorientation Transitions, and Spin Waves in R2CuO4 (R=Nd, Pr, and Sm)

Simple item page
dc.contributor.authorYildirim, Taner
dc.contributor.authorSachidanandam, Ravi
dc.contributor.authorHarris, A. Brooks
dc.contributor.authorYildirim, Taner
dc.contributor.authorHarris, A. Brooks
dc.contributor.authorAharony, Amnon
dc.contributor.authorEntin-Wohlman, Ora
dc.date2023-05-17T12:06:45.000
dc.date.accessioned2023-05-23T00:24:54Z
dc.date.available2023-05-23T00:24:54Z
dc.date.issued1997-07-01
dc.date.submitted2015-08-04T12:34:33-07:00
dc.description.abstractWe report a detailed study of single-ion anisotropy and crystal-field effects in rare-earth cuprates R2CuO4 (R=Nd, Pr, and Sm). It is found that most of the magnetic properties are mainly due to the coupling between the copper and rare-earth magnetic subsystem which exhibits a large single-ion anisotropy. This anisotropy prefers ordering of rare-earth moments along [100] for R=Pr and Nd and along [001] for R=Sm. Combined with a pseudodipolar interaction arising from the anisotropy of the R-Cu exchange, we can explain the magnetic structures of these materials. The spin reorientation transitions in Nd2CuO4 can be explained in terms of a competition between various interplanar interactions which arises because of the rapid temperature dependence of the Nd moment below about 100 K. Finally we introduce a simple two-dimensional model for the Nd spin-wave spectrum. For zero wave vector, this model gives two optical modes involving Cu spins whose temperature-dependent energies agree with experimental results and an acoustic mode whose energy is predicted to be of order √(2k4Δ)≈5μeV, where k4 is the fourfold in-plane anisotropy constant and Δ is the Nd doublet splitting.
dc.description.comments<p>At the time of publication, author Taner Yildirim was affiliated with the University of Maryland, College park, Maryland. Currently, he is a faculty member in the Department of Materials Science and Engineering at the University of Pennsylvania.</p>
dc.identifier.urihttps://repository.upenn.edu/handle/20.500.14332/43053
dc.legacy.articleid1420
dc.legacy.fields10.1103/PhysRevB.56.260
dc.legacy.fulltexturlhttps://repository.upenn.edu/cgi/viewcontent.cgi?article=1420&amp;context=physics_papers&amp;unstamped=1
dc.source.beginpage260
dc.source.endpage286
dc.source.issue343
dc.source.issue1
dc.source.journalDepartment of Physics Papers
dc.source.journaltitlePhysical Review B
dc.source.peerreviewedtrue
dc.source.statuspublished
dc.source.volume56
dc.subject.otherPhysics
dc.titleSingle-Ion Anisotropy, Crystal-Field Effects, Spin Reorientation Transitions, and Spin Waves in R2CuO4 (R=Nd, Pr, and Sm)
dc.typeArticle
digcom.contributor.authorSachidanandam, Ravi
digcom.contributor.authorisAuthorOfPublication|email:taner@seas.upenn.edu|institution:University of Pennsylvania|Yildirim, Taner
digcom.contributor.authorisAuthorOfPublication|email:harris@sas.upenn.edu|institution:University of Pennsylvania|Harris, A. Brooks
digcom.contributor.authorAharony, Amnon
digcom.contributor.authorEntin-Wohlman, Ora
digcom.identifierphysics_papers/343
digcom.identifier.contextkey7412353
digcom.identifier.submissionpathphysics_papers/343
digcom.typearticle
dspace.entity.typePublication
relation.isAuthorOfPublication80f96ce1-bb5b-45c3-99af-78d36747185b
relation.isAuthorOfPublication2bfc1be9-8e1a-4190-9cd7-2f49b510869e
relation.isAuthorOfPublication.latestForDiscovery80f96ce1-bb5b-45c3-99af-78d36747185b
upenn.schoolDepartmentCenterDepartment of Physics Papers
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
single_ion_anisotropy.pdf
Size:
580.28 KB
Format:
Adobe Portable Document Format
Download
Collection
Articles