A remark on determining activation energies by fractional glow technique (FGT) in case of complex glow spectra – a procedure of improving this method

Rudlof, G.; Becherer, Johannes; Glaefeke, H.

doi:10.1002/pssa.2210520252

Cited by 22 publications

(6 citation statements)

References 6 publications

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“…The possibilities of fractional glow technique applil) 620002 Sverdlovsk, USSR. cation (FGT) for determining kinetic parameters of exoemissive centres with high resolution were demonstrated on a-A1203 powders for the first time [6]. With further development of these investigations the results permitting to make conclusions about the impossibility of Auger recombination TSEE in a-A120, have been obtained [7].…”

Section: Introductionmentioning

confidence: 95%

Hole-induced exoelectron emission and luminescence of corundum doped with Mg

Кортов¹,

Bessonova²,

Akselrod³

et al. 1985

phys. stat. sol. (a)

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Thermally stimulated exoelectron emission (TSEE) and thermally stimulated luminescence (TSL) preliminary excited by X‐rays of Al2O3 single crystals containing different amounts of Mg impurities and treated under oxiding and reducing conditions are investigated. TSEE and TSL are found to be due to the recombination process of holes thermally released from traps on Mg2+ ions (TSEE and TSL peaks at 230 K) as well as of electrons thermally released from traps (TSEE and TSL peaks at 255 K). TSEE is observed synchronously with the F‐centre emission in the 3.0 eV band both, in the hole and electron recombination process. The experimental results are interpreted basing on the model of hole‐electron recombination in the two‐centre Auger‐process.

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Section: Introductionmentioning

confidence: 95%

Hole-induced exoelectron emission and luminescence of corundum doped with Mg

Кортов¹,

Bessonova²,

Akselrod³

et al. 1985

phys. stat. sol. (a)

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“…Only E,(T) tends to return to the final energy of the distribution for very low trap occupation in the high temperature tail of the glow curve. Thus E,(T) discriminates PDs from SLPs with high resolution [9,23,241, but with the restrictions of interpretation in the temperature region mentioned.…”

Section: Used Analysing Methods For Activation Energy and Frequency Fmentioning

confidence: 98%

“…Thus the ambiguity of a single computer fit without additional kinetic check can be avoided. 9. A simple and direct experimental check of the validity of the model of SMT can be performed by isothermal decay measurements following linear heating: The intensity further increases provided is somewhat below the dip in s ,~( T ) , j = 1,2,3.…”

mentioning

confidence: 99%

Complete analysis of thermally stimulated relaxation processes — applied to a recent model of exoelectron emission

Rudlof

Glaefeke

1995

Phys. Stat. Sol. (a)

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The behaviour of the fractional glow technique as well as of two new analysing methods using the entire information of two glow curves recorded with different heating rates is numerically investigated and compared with relevant conventional methods for the thermionic exoemission model recently proposed by Sakurai et al. The common application of these methods together with a complete frequency factor analysis allows to get more insight into the nature of the thermally stimulated relaxation processes: three of four model parameters can be directly found here from the experiment. In this way the ambiguity of a fit of a single glow curve without additional kinetic check can be avoided. Two general experimental criteria are given to verify the model. Fur das unlangst von Sakurai et al. vorgeschlagene Modell der thermionischen Exoemission wird das Verhalten der fraktionierten Glowtechnik sowie von zwei neuen Analysenmethoden, die die gesamte Information von zwei mit verschiedenen Heizraten aufgenommenen Glowkuren auswerten, numerisch untersucht und mit dem relevanter konventioneller Methoden verglichen. Die gemeinsame Anwendung dieser Methoden zusammen mit einer vollstandigen Frequenzfaktoranalyse erlaubt tiefere Einblicke in die Natur thermisch stimulierter Relaxationsprozesse: Drei von vier Modellparametern konnen direkt aus dem Experiment erhalten werden. Damit kann die Uneindeutigkeit der Anpassung einer einzelnen Glowkurve ohne zusatzliche Uberprufung der Kinetik vermieden werden. Es werden zwei allgemeine experimentelle Kriterien zur Verifizierung des Modells angegeben. ') Universitatsplatz 03, D-18051 Rostock, Federal Republic of Germany. ' ) Note that due to historical reasons s and fhave interchanged their meaning in comparison to SMT. 508 with G. RUDLOF and H. GLAEFEKE E kT(t')where h, is the number of filled traps at time t = to and temperature T = T, and k the Boltzmann constant.Using this model for linear heating according T(t) = ?(tto), T being the constant heating rate, SMT succeeded in fitting their experimental curves and estimated physically reasonable model parameters [l to 41. Now it is a well establishedbut often ignoredfact in the literature that the fit of a single glow curve is not an unambiguous procedure, i.e. in general it can be done by a variety of models [5 to 171. Thus a successful computer fit is a necessary, but not sufficient, condition for the correctness of the chosen physical model. The experimentalist who wants to get reliable results, which allow a physical interpretation, has to prove the assumptions on which the analysis is based.The correctness of the model can be verified, for example, in the simplest case by fitting or predicting a second glow curve measured under identical excitation but at an appropriate, different heating rate, with the same parameter set, in other words, by checking the invariance of model parameters against a variation of external kinetic conditions [8, 11, 121. In our opinion the more promising way to analyse thermally stimulated relaxation processes...

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“…The three TSEE glow peaks from Ta,O, layers were ascribed [40] t o an oxygen vacancy playing the role of I? centre and having three different vnlency states.…”

Section: The Importance Of Defects In the Solid A Mechanism Proposed mentioning

confidence: 99%

“…With silica emitting in the temperature range 130-650 K , three TSEE peaks were found a t 130-300 K, described by a second-order equation, and four peaks a t 300-650 K described by a first-order equation 1391. The mathematical analysis of such complex glow curves can give the phenon~enological process parameters, according to Rudlof, Becherer and Glaefeke [40]. They fitted glow curves from a-ulurnina and obtained trap parameters and distributions [41.…”

Section: Kinetics and Glow Curves In Exoelechon Emissionmentioning

confidence: 99%

Invited paper. Exoelectron emission from solids

Robertson

1981

International Journal of Electronics

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A remark on determining activation energies by fractional glow technique (FGT) in case of complex glow spectra – a procedure of improving this method

Cited by 22 publications

References 6 publications

Hole-induced exoelectron emission and luminescence of corundum doped with Mg

Hole-induced exoelectron emission and luminescence of corundum doped with Mg

Complete analysis of thermally stimulated relaxation processes — applied to a recent model of exoelectron emission

Invited paper. Exoelectron emission from solids

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