Distribution of Metal Ions and Magnetic Properties in Spinel System Zn(1−x)Ga2x/3Cr2Se4

Structural and magnetic properties of single-crystalline spinel systems ZnCr2−xAlxSe4 (x=0.15 and 0.23)

“…Various types of magnetic order together with concomitant semiconducting behaviour have been reported for chalcogenide spinel materials [2][3][4][5][6][7]. These properties can be modified in a broad range of compound composition, as the spinel crystal structure allows for different cationic substitutions [8][9][10].…”

Distribution of Metal Ions and Magnetic Properties in Spinel System CdCr2−xGaxSe4

“…They raise a question of location of the Ga ions in the tetrahedral or octahedral voids of the spinel structure. It was recently shown that in the system Zn \V Ga V Cr Se the Ga> ions were able to adopt both of these locations, depending on sample stoichiometry and with Zn>-de"cit, gallium-preferred tetrahedral positions (12). There are also some doubts as to the valence of the magnetic Cr> (3d) ions since the reduced values of the e!ective magnetic moments have been explained by the presence of some number of the Cr> ions that always couple antiparallel to the spins of Cr>, causing in e!ect a shift of the paramagnetic Curie}Weiss temperature…”

Structural and magnetic properties of CdxInyCrzSe4

“…It was shown that replacement of the di-or tri-valent cation by a third metal resulted in new chemical compounds with essentially changed physical properties [1][2][3][4][5][6][7][8][9][10][11][12][13]. However, experimental results reported in the literature so far refer mostly to polycrystalline forms of the quaternary selenides.…”