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Microscopic Evidence of Spin State Order and Spin State Phase Separation in Layered CobaltitesRBaCo2O5.5withR=Y, Tb, Dy, and Ho

H. Luetkens, M. Stingaciu, Yu. G. Pashkevich, K. Conder, E. Pomjakushina, A. A. Gusev, K. V. Lamonova, P. Lemmens, H.-H. Klauss
2008 Physical Review Letters  

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2008 pre-print arXiv:0805.4509v1 fatcat:sx4zagk37ngrxkq6onalatt5xe
We report muon spin relaxation measurements on the magnetic structures of RBaCo_2O_5.5 with R=Y, Tb, Dy, and Ho. Three different phases, one ferrimagnetic and two antiferromagnetic, are identified below 300 K. They consist of different ordered spin state arrangements of high-, intermediate-, and low-spin Co^3+ of CoO_6 octahedra. Phase separation into well separated regions with different spin state order is observed in the antiferromagnetic phases. The unusual strongly anisotropic
more » ... ance and its onset at the FM-AFM phase boundary is explained.
doi:10.1103/physrevlett.101.017601 pmid:18764150 fatcat:eqbhob7alff53cvgq27u3if2se
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H. Luetkens, M. Stingaciu, Yu. G. Pashkevich, K. Conder, E. Pomjakushina, A. A. Gusev, K. V. Lamonova, P. Lemmens, H.-H. Klauss. "Microscopic Evidence of Spin State Order and Spin State Phase Separation in Layered CobaltitesRBaCo2O5.5withR=Y, Tb, Dy, and Ho." Physical Review Letters 101.1 (2008)