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Heat Capacity Study of Ti and Zn‐doped Magnetite
Author(s) -
Kozłowski A.,
Ka̧kol Z.,
Kim D.,
Zalecki R.,
Honig J. M.
Publication year - 1997
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.19976230118
Subject(s) - magnetite , doping , charge ordering , materials science , dopant , oxygen , inorganic chemistry , mineralogy , metallurgy , thermodynamics , chemistry , charge (physics) , physics , optoelectronics , quantum mechanics , organic chemistry
Heat capacities have been measured on single crystal specimens of magnetite containing low levels of Ti or Zn as a replacement for iron. A change in the nature of the Verwey transition from first to second or higher order was observed with increasing doping levels. This is in strict analogy with prior observations showing a similar change when the oxygen/iron ratio is increased beyond the 4/3 ratio. The entropy of the Verwey transition diminishes with increasing concentration of dopants.