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    Magnetic Fluctuations and Short-Range Order In Frustrated Triangular SrCr Sub (8-x) Ga Sub (4-x) O Sub (19)

Magnetic Fluctuations and Short-Range Order in Frustrated Triangular SrCr sub (8-x) Ga sub (4-x) O sub (19)

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In SrCr sub (8-x) Ga sub (4+x) O sub (19) antiferromagnetically interacting (theta sub CW)~500K) Cr ions occupy a 2d Kagome' lattice. The groundstate of Ising spins on this lattice is known to be disordered and to have a higher ground-state entropy than the triangular lattice. We have studied the magnetic fluctuations and short-range order in this highly correlated but disordered system by magnetic neutron-scattering.