Results found: 2

Number of results on page

Search results

Search:
in the keywords: 78.60.Lc

Sort By:

Limit search:

Experimental and Theoretical Analysis οf PbTe-CdTe Solid Solution Grown by Physical Vapour Transport Method

100%

Szot M., Szczerbakow A., Dybko K., Kowalczyk L., Smajek E., Domukhovski V., Łusakowska E., Dziawa P., Mycielski A., Story T., Bukała M., Galicka M., Sankowski P., Buczko R., Kacman P.

Acta Physica Polonica A

2009

vol. 116

issue 5

959-961

Bulk monocrystals of Pb_{1-x}Cd_{x}Te, with the Cd content x up to 0.11, were grown by physical vapour transport method. The structural, electrical and optical properties of these ternary crystals were studied experimentally and theoretically. All investigated samples exhibit rock-salt structure and high crystal quality, which was confirmed by X-ray rocking curve width parameter of about 100 arcsec. The decrease of the lattice parameter with increasing Cd content x was found experimentally, in agreement with ab initio calculations. The band structures of Pb_{1-x}Cd_{x}Te mixed crystals for x values up to 0.2 were calculated using tight binding approach. The calculated band gap in the L-point increases with the Cd content in qualitative agreement with photoluminescence measurements in the infrared. For all studied Pb_{1-x}Cd_{x}Te samples, the Hall effect and electrical conductivity measurements, performed in the temperature range from 4 to 300 K, revealed p-type conductivity.

Effect of Mn Doping on the Structural, Optical and Magnetic Properties of SnO_2 Nanoparticles

100%

Saravanakumar M., Agilan S., Muthukumarasamy N., Rukkumani V., Marusamy A., Ranjitha A.

Acta Physica Polonica A

2015

vol. 127

issue 6

1656-1661

Undoped and Mn doped SnO_2 prepared by co-precipitation method exhibits nanocrystalline nature with prominent peaks along (110), (101), (211), and (310) planes. All the prepared samples are nanocrystalline with crystallite size lying in the range of 4.8-5.6 nm. The prepared SnO_2 nanoparticles exhibit single tetragonal crystalline phase. The high resolution transmission electron microscopy images show that the particles are nanocrystalline in nature. The composition of the prepared samples have been analyzed using energy dispersive analysis of X-rays spectra. The photoluminescence spectroscopy shows the recombination of electrons in singly occupied oxygen vacancies with photoexcited holes in the valence band. Broad UV emission at 426 nm is observed in photoluminescence. UV-vis absorption spectral studies showed a peak at 385 nm. Magnetic measurements revealed that all the doped samples exhibit room temperature ferromagnetism, which is identified as an intrinsic characteristic obtained on doping. Pure SnO_2 nanoparticles showed diamagnetism, SnO_2 with lower Mn content show larger magnetization and with increasing Mn content the retentivity and coercivity are found to decrease.

Refine search results

2 Acta Physica Polonica A

1 2015

1 2009

1 Agilan S.

1 Buczko R.

1 Bukała M.

1 Domukhovski V.

1 Dybko K.

1 Dziawa P.

1 Galicka M.

1 Kacman P.

1 Kowalczyk L.

1 Marusamy A.

1 Muthukumarasamy N.

1 Mycielski A.

1 Ranjitha A.

1 Rukkumani V.

1 Sankowski P.

1 Saravanakumar M.

1 Smajek E.

1 Story T.

1 Szczerbakow A.

1 Szot M.

1 Łusakowska E.

Search results

Experimental and Theoretical Analysis οf PbTe-CdTe Solid Solution Grown by Physical Vapour Transport Method

Effect of Mn Doping on the Structural, Optical and Magnetic Properties of SnO_2 Nanoparticles