Growth and structural properties of Zn1−xCrxTe crystals

Chromium-Doped ZnO Nanoparticles Synthesized by Co-Precipitation: Chromium Effects

“…As a dopant of the ZnO matrix, Cr can be incorporated in several ways [37]: 1) the electronic configuration of Cr can be 3d 4 4s 2 , with the two 4s electrons incorporated in the tetrahedral bonding scheme, resulting in Cr 2+ as an isoelectronic center; 2) a 3d 5 4s 2 configuration can be formed by borrowing an electron from the valence band of the host with only one 4s electron of Cr being incorporated in the tetrahedral bonding scheme, resulting in Cr + and causing the other Therefore, we believed that our ESR signal arose from the Cr 3+ centers instead of the Cr 2+ ions. A similar result was also obtained by Krishnaiah et al [43] in ZnCrTe crystals.All spectra lines were centered at approximately 550 G, corresponding to an effective g-value of 1.989 which is attributed to the typical value of Cr 3+ ions [42,45]. All of the g-values of the spectrum observed in Cr-doped ZnO correspond not only to the Cr 3+ ions observed in Cr-doped II-VI compounds, but also to an unpaired electron trapped at an oxygen vacancy site.…”

Magnetic Properties of (Zn,Mn)Te Semimagnetic Alloy Co-Doped with Chromium

“…The reference (ZnMn)Te and (ZnCr)Te samples were not doped with phosphorus. Although Mn is fully soluble in ZnTe, the solubility of Cr in ZnTe is limited to about 0.005 [2]. Thus the real chromium concentration in the samples is less than its concentration in the charge.…”

Вариативность результирующего поля микродеформаций в кристаллах Zn-=SUB=-1-x-=/SUB=-V-=SUB=-x-=/SUB=-Se (0.01≤ x≤0.10)

“…Известно, что при легировании халькогенидов ZnSe и ZnS примесью Mn их кубическая модификация сохраня-ется до концентраций соответственно x ∼ 0.35 и 0.10 в формульной единице [9], а с дальнейшим увеличением содержания Mn обнаруживается интервал стабильности только для гексагональной фазы. Превышение предела растворимости 3d-иона с несферической электронной d-оболочкой в матрице II−VI требует контроля качества синтеза методами, позволяющими выявить в исследуе-мом образце образовавшиеся преципитаты соответству-ющего халькогенида 3d-элемента, как правило, в наибо-лее характерной для них кристаллической модификации со структурным типом NiAs [12].…”