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Spin-flop transition in Gd5Ge4 observed by x-ray resonant magnetic scattering and first-principles calculations of magnetic anisotropy

TitleSpin-flop transition in Gd5Ge4 observed by x-ray resonant magnetic scattering and first-principles calculations of magnetic anisotropy
Publication TypeJournal Article
Year of Publication2008
AuthorsTan L, Kreyssig A, Nandi S, Jia S, Lee YB, Lang JC, Islam Z, Lograsso TA, Schlagel DL, Pecharsky VK, Gschneidner KA, Canfield PC, Harmon BN, McQueeney RJ, Goldman AI
Journal TitlePhysical Review B
Volume77
Pages064425
Date PublishedFeb
Type of ArticleArticle
ISBN Number1098-0121
Accession NumberISI:000253764100062
Keywordselectrical-resistance, field, GADOLINIUM, gd-5(si2ge2), REPRESENTATION
Abstract

X-ray resonant magnetic scattering was employed to study a fully reversible spin-flop transition in orthorhombic Gd5Ge4 and to elucidate details of the magnetic structure in the spin-flop phase. The orientation of the moments at the three Gd sites flop 90 degrees from the c axis to the a axis when a magnetic field, H-sf=9 kOe, is applied along the c axis at T=9 K. The magnetic space group changes from Pnm(')a to Pn(')m(')a(') for all three Gd sublattices. The magnetic anisotropy energy determined from experimental measurements is in good agreement with the calculations of the magnetic anisotropy based on the spin-orbit coupling of the conduction electrons and an estimation of the dipolar interactions anisotropy. No significant magnetostriction effects were observed at the spin-flop transition.
DOI10.1103/PhysRevB.77.064425
Alternate JournalPhys. Rev. B