12
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      Ferromagnetic - spin glass transition induced by pressure in the geometrically frustrated pyrochlore (Tb\(_{1-x}\)La\(_x\))\(_2\)Mo\(_2\)O\(_7\)

      Preprint
      , , , ,

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          We have studied (Tb\(_{1-x}\)La\(_x\))\(_2\)Mo\(_2\)O\(_7\) pyrochlores by neutron diffraction and \(\mu\)SR at ambient and under applied pressure. Substitution of Tb for La expands the lattice and induces a change from a spin-glass like state ({\itshape x}=0) to a non collinear ferromagnet ({\itshape x}=0.2). In the ferromagnetic structure, the Tb moments orient close to their local anisotropy axis as for an ordered spin ice, while the Mo moments orient close to the net moment. The \(\mu\)SR dynamical relaxation rate shows a cusp-like peak at the Curie temperature T\(_C\) and a broad anomaly at T\(^\star\)$<\(T\)_C$, suggesting a second transition of local or dynamical nature. Under pressure, the long range order breaks down and a spin glass-like state is recovered. The whole set of data provide a microscopic picture of the spin correlations and fluctuations in the region of the ferromagnetic-spin glass threshold.

          Related collections

          Author and article information

          Journal
          27 April 2006
          Article
          cond-mat/0604627
          051d17c6-c85e-473f-8204-e6619ef16479
          History
          Custom metadata
          4 pages, 4 figures
          cond-mat.str-el

          Comments

          Comment on this article