Low temperature EPR spectra of Fe3+centers in ternary layered TlGaS2crystal

AbstractThe electronic structure of nitrogen donors in 6H-, 4H- and 3C-SiC is investigated by measuring the nitrogen hyperfine (hf) interactions with electron nuclear double resonance (ENDOR) and the temperature dependence of the hf split electron paramagnetic resonance (EPR) spectra. Superhyperfine (shf) interactions with many shells of 13C and 29Si were measured in 6H-SiC. The hf and shf interactions are discussed in the framework of effective mass theory. The temperature dependence is explained with the thermal occupation of the lowest valley-orbit split A1 and E states. It is proposed that the EPR spectra of P donors observed previously in neutron transmuted 6H-SiC at low temperature (<10K) and high temperature (>60K) are all due to substitutional P donors on the two quasi-cubic and hexagonal Si sites, whereby at low temperature the E state is occupied and at high temperature the A1 state. The low temperature spectra are thus thought not to be due to P-vacancy pair defects as proposed previously.

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Geochemistry and EPR of cassiterites from the Iberian Hercynian Massif

Mineralogical Magazine ◽

10.1180/minmag.1997.061.406.03 ◽

1997 ◽

Vol 61 (406) ◽

pp. 357-365 ◽

Cited By ~ 19

Author(s):

A. Murciego ◽

A. Garcla Sanchez ◽

Y. Dusausoy ◽

J. M. Martin Pozas ◽

R. Ruck

Keyword(s):

High Temperature ◽

Low Temperature ◽

Microprobe Analysis ◽

Epr Spectra ◽

Quartz Veins ◽

Coupled Substitution ◽

Tin Deposits ◽

Microprobe Data

AbstractThis paper is based on microprobe analysis (Ta, Nb, Fe, Mn, Ti, W, Sn) and Fe3+EPR spectra of cassiterite samples from 14 tin deposits from the Iberian Hercynian Massif. The interpretation of microprobe data, atomic ratios (Fe+Mn)/(Nb+Ta), and Fe3+EPR spectra reveal that the coupled substitution: 3Sn4+= (Fe,Mn)2++ 2(Nb,Ta)5+is dominant in cassiterites from pegmatites, and high-temperature quartz veins and in the dark zones of cassiterites.The mechanisms:2Sn4+= Fe3++ (Nb,Ta)5+andSn4++ O2−= Fe3++ OH−are dominant in those from medium-low temperature quartz veins and in the light zones of cassiterites.

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EPR Spectra of ferric cytochromes c′ from five strains of Achromobacterxylosoxidans at low temperature and their temperature dependence

Biochemical and Biophysical Research Communications ◽

10.1016/0006-291x(90)92029-y ◽

1990 ◽

Vol 169 (3) ◽

pp. 1235-1241 ◽

Cited By ~ 9

Author(s):

Tetsuhiko Yoshimura ◽

Shinnichiro Suzuki ◽

Takamitsu Kohzuma ◽

Hidekazu Iwasaki ◽

Sohsuke Shidara

Keyword(s):

Low Temperature ◽

Temperature Dependence ◽

Epr Spectra ◽

Cytochromes C

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Unsaturated lipid bilayers at cryogenic temperature: librational dynamics of chain-labeled lipids from pulsed and CW-EPR

Physical Chemistry Chemical Physics ◽

10.1039/c9cp03318a ◽

2019 ◽

Vol 21 (34) ◽

pp. 18699-18705 ◽

Cited By ~ 2

Author(s):

Erika Aloi ◽

Rita Guzzi ◽

Rosa Bartucci

Keyword(s):

Low Temperature ◽

Lipid Bilayers ◽

Cryogenic Temperature ◽

Acyl Chain ◽

Epr Spectra ◽

Unsaturated Lipid ◽

Librational Motion

Echo-detected EPR spectra are used to study the effects of acyl chain unsaturation on the librational motion of chain-labeled lipids in the low-temperature phases of POPC and DOPC bilayers.

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