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Spinels of composition LiM Y Mn 2−Y O 4 , M=Cr 3+ , Co 3+ , or Ni 2+ , Y=0.1 and 1 for the Cr and Co dopants, Y=0.05 and 0.5 for the Ni sample, have been synthesized by a sucrose-aided combustion method. The samples as prepared require of an additional thermal treatment at 700°C, 1h to get stoichiometric single-phase spinels. The samples consist of aggregated...
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