Angular dependence of the ESR spectra of chromium trisacetylacetonate in an oriented single crystal

1978 ◽  
Vol 18 (5) ◽  
pp. 755-757
Author(s):  
I. G. Bikchantaev ◽  
I. V. Ovchinnikov
Keyword(s):  
Single Crystal ◽  
Angular Dependence ◽  
Esr Spectra ◽  
Oriented Single Crystal

Origin of Paramagnetic Defect in Single Crystal and Ceramic B4C

1987 ◽  
Vol 97 ◽  
Author(s):  
E. L. Venturini ◽  
D. Emin ◽  
T. L. Aselage
Keyword(s):  
Single Crystal ◽  
Angular Dependence ◽  
Esr Spectra ◽  
Single Crystal Sample ◽  
Paramagnetic Defect ◽  
Crystal Sample ◽  
Spin Resonance ◽  
Integrated Intensity ◽  
Increasing Temperature ◽  
Positively Charged

ABSTRACTWe compare electron spin resonance (ESR) spectra of B4C samples made by three methods. The samples are 1) two ceramics made by hot-pressing boron and carbon powders, 2) a polycrystal made by carbothermic reduction, and 3) a single crystal grown from a palladium metal melt. All samples show remarkably similar spectra between 2 and 100 K. In particular, all samples show a single Lorentzian absorption, a linewidth that decreases with increasing temperature, and an inverse temperature dependence of the integrated intensity. The integrated intensity of the paramagnetic spin signal corresponds to a density of 2×1019/cm2 localized spins. Having a single crystal sample enables us to meaningfully measure the angular dependence of the ESR linewidth. This angular dependence is consistent with the paramagetic centers being unpaired electrons centered on the central carbon atoms of positively charged C-C-C intericosahedral chains. These chains appear to replace 0.5 % of the positively charged C-B-C intericosahedral chains which occur in B4C.

Effect of grain boundaries in La0.84Sr0.16CoO3−δ on oxygen diffusivity and surface exchange kinetics

2021 ◽  
Author(s):  
Natalia Porotnikova ◽  
Andrei Farlenkov ◽  
Sergey Naumov ◽  
Maxim Vlasov ◽  
Anna Khodimchuk ◽  
...  
Keyword(s):  
Single Crystal ◽  
Grain Boundaries ◽  
Gas Phase ◽  
Oxygen Exchange ◽  
Polycrystalline Specimen ◽  
Surface Exchange ◽  
Oxygen Diffusivity ◽  
Exchange Kinetics ◽  
Oriented Single Crystal

The 16O/18O oxygen exchange kinetics between the gas phase and the oriented single crystal and polycrystalline specimen has been studied; the rates of individual stages of oxygen exchange have been calculated and discussed.

Rapid growth of large-area single-crystal graphene film by seamless stitching using resolidified copper foil on a molybdenum substrate

2019 ◽  
Vol 7 (31) ◽  
pp. 18373-18379 ◽  
Author(s):  
Yuan Cheng ◽  
Hui Bi ◽  
Xiangli Che ◽  
Wei Zhao ◽  
Dezeng Li ◽  
...  
Keyword(s):  
Single Crystal ◽  
Rapid Growth ◽  
Copper Foil ◽  
Film Growth ◽  
Graphene Film ◽  
Large Area ◽  
Molybdenum Substrate ◽  
Oriented Single Crystal

Single-crystal graphene film growth by the seamless stitching of highly oriented single-crystal graphene domains on a resolidified Cu (111) surface.

Oriented Single-Crystal LiTaO3 Thin Film on Silicon for High Performances SAW Components

2018 ◽  
Author(s):  
Marie Gorisse ◽  
Alexis Drouin ◽  
Yann Sinquin ◽  
Isabelle Huyet ◽  
Emilie Courjon ◽  
...  
Keyword(s):  
Thin Film ◽  
Single Crystal ◽  
Oriented Single Crystal

Indirect Coupling Constants in a Thallium Single Crystal

1974 ◽  
Vol 52 (8) ◽  
pp. 687-693
Author(s):  
J. Schratter ◽  
D. Llewelyn Williams
Keyword(s):  
Single Crystal ◽  
Angular Dependence ◽  
Line Width ◽  
Orientation Dependence ◽  
Coupling Constants ◽  
Second Moment ◽  
Indirect Coupling ◽  
First Time

We have measured the angular dependence of the line width in thallium and related it to the second moment to estimate the pseudodipolar and pseudoexchange contributions for the first two shells of neighbors. These values are very different, despite the fact that both shells have nearly the same radius, and this establishes experimentally for the first time an orientation dependence of the indirect coupling constants.

Negative component observed in the angular dependence of magnetoresistance in the single crystal of Pr x Y1−x Ba2Cu3O7−δ

1996 ◽  
Vol 46 (S3) ◽  
pp. 1381-1382
Author(s):  
Shigeki Yamada ◽  
Hiroyuki Hoshi ◽  
Hidehiro Nakata ◽  
Shinji Kuroda ◽  
Kôki Takita
Keyword(s):  
Single Crystal ◽  
Angular Dependence ◽  
Negative Component
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