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  • 1
    Electronic Resource
    Electronic Resource
    Electric quadrupole interaction at 111Cd and 119Sn in isostructural NiIn and CoSn compounds (1997)
    Springer
    Hyperfine interactions 110 (1997), S. 183-194 
    Details
    ISSN: 1572-9540
    Keywords: intermetallic compound, perturbed angular correlations, Mössbauer spectroscopy, electric field gradient
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The perturbed angular correlation technique and Mössbauer spectroscopy were applied to study the electric field gradient on 111Cd and 119Sn probe atoms in isostructural NiIn and CoSn compounds. The 111Cd PAC measurements performed in the temperature range 80--1100 K demonstrated the existence of two axially symmetric EFG's in each of the investigated compounds, related to the 2(d) and 1(a) probe sites in the B35 structure. A 1(a)-site preference for Cd probes in CoSn compound was observed. The temperature dependence of the quadrupole frequencies for 111Cd in both compounds, interpreted in terms of the empirical model proposed by Christiansen et al.[1], follows a T3/2 relation with different slope parameters for each of the observed frequencies. These results are combined with the data from the Mössbauer experiment. The 119Sn Mössbauer spectra taken at liquid nitrogen and at room temperatures showed two quadrupole split doublets with the intensity ratio 2:1 for CoSn and 8:1 for NiIn0.99Sn0.01sample, giving an evidence of 2(d)-site preference for tin atoms in NiIn. The EFG values measured on 119Sn are 2.5 to 4 times larger than those on 111Cd nuclei, while the ratio of the respective Sternheimer antishielding factors is equal to 0.77. Within the limits of errors no differences were observed in the magnitude and temperature dependence of Debye--Waller factors for 2(d) and 1(a) 119Sn positions in CoSn and NiIn lattices.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1012635702274
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  • 2
    Electronic Resource
    Electronic Resource
    TDPAC studies of internal AgIn alloy oxidation (1982)
    Springer
    Hyperfine interactions 12 (1982), S. 95-104 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The internal oxidation of dilute AgIn alloys in open air versus In concentration and oxidation temperature was investigated by the TDPAC technique. The111In interaction described by the broad quadrupole frequencies distribution aroundv Q = 115 MHz and η=0.5–0.7 was observed and interpreted as due to nonstoichiometric In−OX cluster formation. For higher temperatures and more concentrated alloys additionally quasiunique frequencyv Q ≈ 157 MHz with η≈0.28 was evidenced and ascribed to111In interaction inside In2O3 precipitates. The internal oxidation under reduced oxygen pressures was studied and the thermal stability of the complex formed was tested. The effect of surface preparation on internal oxidation was observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01026362
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  • 3
    Electronic Resource
    Electronic Resource
    Au/In bilayers studied with 111In deposited at the interface (1999)
    Springer
    Hyperfine interactions 120-121 (1999), S. 319-323 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Au/In bilayer samples of different stoichiometries were studied using the time-differential perturbed angular correlation technique. The 111In probe atoms were deposited at the gold/indium interface to follow the formation of the intermetallic compounds at an early stage. Au-In phases of different composition (AuIn2, AuIn, Au7In3, Au3In) were created at the interfaces upon annealing. In addition a metastable Au7In3(m) phase, observed only after quenching in the bulk Au0.7In0.3 alloy, was found.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1017004213371
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  • 4
    Electronic Resource
    Electronic Resource
    Indium solubility in iron studied with perturbed angular correlations (1999)
    Springer
    Hyperfine interactions 120-121 (1999), S. 433-437 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Segregation of In in Fe-based alloys containing 0.11–2.12 at.% In has been studied by measuring the perturbed angular correlations of γ-rays emitted in the nuclear decay of 111In. The probe atoms were introduced into the alloys by either adding the carrier-free 111In during melting or via ion implantation. Ageing of the samples at elevated temperatures followed by a slow cooling to room temperature allowed us to determine the upper limit of the solubility at room temperature, S(300 K)≤ 30 at. ppm. This value is far below the one reported in the published phase diagram. Quenching of the samples in water from 973–1373 K resulted in the determination of the indium solubility in iron at these elevated temperatures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1017045422457
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  • 5
    Electronic Resource
    Electronic Resource
    Interaction between impurities in Ag dilute alloys (1978)
    Springer
    Hyperfine interactions 4 (1978), S. 605-609 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01021899
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  • 6
    Electronic Resource
    Electronic Resource
    TDPAC studies of the kinetics of diffusion-limited reactions in dilute AgPt alloy (1990)
    Springer
    Hyperfine interactions 60 (1990), S. 837-840 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The TDPAC studies of In-Pt pairs formation in dilute AgPt alloy in nonequilibrium state are performed. The concentration of the In-Pt complexes is measured for different annealing temperatures and times. The results are compared with calculations based on the model of diffusion controlled bimolecular reactions. The conclusions about diffusion enhancement due to radiation damage and the interaction of impurities with radiation defects are drawn.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02399882
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  • 7
    Electronic Resource
    Electronic Resource
    Perturbed angular correlation experiments on111In in oxidized AgCd alloy (1991)
    Springer
    Hyperfine interactions 62 (1991), S. 301-310 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The hyperfine interaction of111Cd probes in preoxidized and α-irradiated Ag0.94Cd0.06 alloy has been investigated by PAC measurements and compared with the results for pure Ag. Several probe atom sites were distinguished and characterized by their hyperfine parameters and temperature evolution. The different behavior of In-oxygen and In-oxygen-vacancy complexes in AgCd and Ag was found and discussed. A considerable influence of the irradiation temperature and sample thickness on the different In-oxygen-vacancy complexes formation was evidenced. The parameters of111Cd quadrupole interaction measured during isochronal annealing studies in preoxidized and deuteron irradiated AgCd were very similar to the ones observed after α-irradiation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02397710
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  • 8
    Electronic Resource
    Electronic Resource
    PAC study of compound formation in the In-Pt system (1993)
    Springer
    Hyperfine interactions 78 (1993), S. 315-318 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The perturbed angular correlation technique was applied to measure the quadrupole interaction parameters of111Cd at the In sites in electroplated In/Pt bilayers successively annealed at elevated temperatures. The consecutive creation of different compounds was evidenced by means of their PAC signal. The In7Pt3 andIn3Pt2 compounds were identified by comparison of the observed quadrupole interaction parameters with those measured for In-Pt bulk samples with defined stoichiometry.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00568154
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  • 9
    Electronic Resource
    Electronic Resource
    The Ag−In intermetallic compound formation from Ag and In electrodeposited layers observed by PAC (1990)
    Springer
    Hyperfine interactions 60 (1990), S. 841-844 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The PAC method was applied to study the intermetallic compound formation at Ag−In interfaces. The electrodeposited Ag−In layers of different Ag: In atomic ratios were prepared and isochronal annealing program was performed. For the comparison the bulk Ag75In25 and Ag66In34 specimens were examined. The Ag2In and AgIn2 compounds were detected and the quadrupole hyperfine interaction parameters for111In in Ag2In were measured as υQ107.9(3) MHz and η=0.48 (2).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02399883
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  • 10
    Electronic Resource
    Electronic Resource
    PAC studies of AgIn2 andAg2In growth kinetics at the Ag-In interface (1993)
    Springer
    Hyperfine interactions 78 (1993), S. 323-326 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The formation of AgIn2 andAg2In compounds at Ag-In interface in Ag/In electrodeposited samples was studied by TDPAC in an isothermal annealing experiment in annealing temperatures 300–423 K. For 300 K the AgIn2 average thickness growth was found to follow a square root of time dependence but for higher temperatures a saturation like effect was observed. At annealing temperature 423 K the Ag2In formation took place anda linear growth of its average thickness versus t1/2 was found.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00568156
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