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Dynamic properties of a diluted pyrochlore cooperative paramagnet (Tb(p)Y(1-p))2Ti2O7 | | A Keren
; J S Gardner
; G Ehlers
; A Fukaya
; E Segal
; Y J Uemura
; | | Date: |
12 Mar 2004 | | Journal: | Phys Rev Lett, 92 (10), 107204 | | Abstract: | Investigations of the spin dynamics of the geometrically frustrated pyrochlore (Tb(p)Y(1-p))2Ti2O7, using muon spin relaxation and neutron spin echo, as a function of magnetic coverage p, have been carried out. Our major finding is that paramagnetic fluctuations prevail as T-->0 for all values of p, and that they are sensitive to dilution, indicating a cooperative spin motion. However, the percolation threshold pc is not a critical point for the fluctuations. We also find that the low temperature spectral density has a 1/f behavior, and that dilution slows down the spin fluctuations. | | Source: | PubMed, pmid15089239 | | Services: | Forum | Review | Favorites | |
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