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  • 1
    Electronic Resource
    Electronic Resource
    151Eu Mössbauer study of the high-Tc superconductor Bi2Ca0.5Eu0.5Sr2Cu2Ox (abstract) (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 67 (1990), S. 5083-5083 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Isomer shift measurements show the Eu to be trivalent and nonmagnetic with no apparent anomaly between measurements made above and below the transition temperature (Tc=87 K). The value of the isomer shift at room temperature (0.69±0.02 mm/s) falls within the values observed by previous researchers on other types of Eu-based high-Tc superconductors. A discussion on the isomer shift and f factor as a function of temperature will be reported and compared with previous results found in Eu-based high-Tc superconductors.1–3
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.344679
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  • 2
    Electronic Resource
    Electronic Resource
    Mössbauer and magnetic studies of Eu porphyrins (abstract) : 35th annual conference on magnetism and magnetic materials (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 6022-6022 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report the first measurements on porphyrin compounds using Eu as the Mössbauer nuclide. There have been many Mössbauer studies on iron porphyrins1,2 and a few on tin.3 We have successfully prepared and made Mössbauer and magnetic susceptibility measurements on four Eu based porphyrin compounds to elucidate the relationship between magnetic properties and structure. Absorption spectra using the 21.6 keV gamma ray of 151Eu were obtained at room temperature and 80 K and yielded very broad singlets with room temperature isomer shift values between 0.20±0.02 mm/s and 0.90±0.02 mm/s with respect to EuF3. Experimental results show the Eu ion to be in the trivalent oxidation state. A discussion of the electronic properties and structure will be reported and compared with previous results found on iron and tin based porphyrins.〈ks〉
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.347799
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  • 3
    Electronic Resource
    Electronic Resource
    Magnetic properties of bulk Eu2/3Ca1/3MnO3 (1999)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 85 (1999), S. 5387-5389 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The magnetic and structural properties of the bulk manganite Eu2/3Ca1/3MnO3 are characterized using Mössbauer spectroscopy, magnetization measurements, x-ray diffraction, and resistivity measurements. Here it is demonstrated that one can investigate the magnetic properties of manganites using Mössbauer spectroscopy by doping with europium at the rare earth site and using rays from Eu151 as a probe. Mössbauer measurements were performed at several temperatures between 15 and 293 K using a 151Eu source. The spectrum at room temperature is a single line demonstrating paramagnetism with an isomer shift of 0.60±0.02 mm/s. Measurements at room temperature show the Eu to be trivalent and single phase with a linewidth of 2.933±0.004 mm/s, which is comparable to that found for the Mössbauer standard EuF3. Measurements below 100 K show a much broader linewidth which at 15 K is more than twice that found at 293 K and is associated with a magnetic phase transition. Magnetization as a function of magnetic field measurements up to 5 T show the system to be paramagnetic at 300 K and ferromagnetic-like at 50 K. Magnetic susceptibility measurements made between 300 and 4.2 K show the sample to be paramagnetic down to 100 K, where it undergoes a magnetic phase transition. Mössbauer, resistivity, and magnetic measurements all indicate a change in the paramagnetic state around 230 K. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.369986
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  • 4
    Electronic Resource
    Electronic Resource
    Interpretation of cyclosporin A levels in pregnancy following orthoptic liver transplantation (1995)
    Oxford, UK : Blackwell Publishing Ltd
    BJOG 102 (1995), S. 0 
    Details
    ISSN: 1471-0528
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-0528.1995.tb11366.x
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  • 5
    Electronic Resource
    Electronic Resource
    Magnetic and structural properties of MMNi4.15Fe0.85 and its hydride (abstract) (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 3620-3620 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Mischmetal (MM) has been considered as a possible substitute for the rare-earth component in both permanent magnets1,2 and hydrogen storage intermetallics. We have investigated the magnetic and structural properties of a mischmetal-nickel-iron intermetallic and its hydride using magnetization, Mössbauer, x-ray diffraction, and SEM measurements. Magnetic susceptibility measurements were made between room and liquid-nitrogen temperatures. There was a change in the magnetic character of the unhydrided sample at 140 K. Hydriding produced a large increase in the susceptibility with a corresponding change in the magnetization at low temperatures. The 57Fe Mössbauer spectra of the intermetallic yielded a doublet at room temperature and demonstrated a change in magnetic behavior similar to the magnetization results at low temperatures. Experimental data were used to interpret the hydrogen absorption mechanism acting in this intermetallic and the results are discussed with respect to previously proposed models for rare earth-transition metal compounds.3,4
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.340715
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  • 6
    Electronic Resource
    Electronic Resource
    Transmission Mössbauer spectroscopy on pulsed-laser-deposited thick Fe and Ni–Zn ferrite films (1999)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 75 (1999), S. 2993-2995 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Mössbauer spectroscopy with 57Fe is used to characterize pulsed-laser-deposited (PLD) Ni0.6Zny–Fe2O4 films is demonstrated. Mössbauer spectra were recorded as a function of film thickness (3–16 μm) for films deposited in background O2 pressures of 50 and 200 mTorr, and for a zinc concentration of y=0.72. A spectrum was also recorded for y=0.4 deposited in a background pressure of 200 mTorr. The site occupancy was determined for the tetrahedral (A) and octahedral (B) sites. Results obtained here show that the effect of increasing the Zn is to shift Fe(tet) to Fe(oct). When compared with previous Mössbauer measurements on the bulk NiZn ferrites, the ferrite films give spectra of similar quality with no visible evidence of clustering or multiple phases present. The same linewidth was found for a PLD processed Fe film and a Mössbauer standard 70-μm-thick α-Fe enriched foil. The Fe film had a magnetic hyperfine field of 334 kOe and no evidence of the presence of any iron oxides. Good spectra may be obtained by selecting substrates with low mass and low atomic number. We were successful in obtaining measurable Mössbauer spectra for films deposited on 0.5-mm-thick MgO, sapphire, and alumina substrates whereas films deposited on Si, GaAs, and cubic zirconia substrates did not give good spectra. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.125212
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  • 7
    Electronic Resource
    Electronic Resource
    Coöperation of the Medical and Safety Departments. (1925)
    s.l. : American Chemical Society
    Industrial & engineering chemistry 17 (1925), S. 1286-1286 
    Details
    ISSN: 1520-5045
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ie50192a036
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  • 8
    Electronic Resource
    Electronic Resource
    The Lipoate-Containing Domain of PDC E2 Contains the Main Immunogenic Region of the 70-kDa M2 Autoantigen in Primary Biliary Cirrhosis (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 573 (1989), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1989.tb15034.x
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  • 9
    Electronic Resource
    Electronic Resource
    Mössbauer studies on LaNi4.7Sn0.3 and its hydride (1985)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 57 (1985), S. 3250-3251 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Mössbauer measurements were made on LaNi4.7Sn0.3 at room and liquid nitrogen temperatures. Experimental data yielded a singlet at room temperature and a doublet at liquid nitrogen temperature. Spectra of the hydrided sample yielded a doublet at liquid nitrogen temperature with an increase in the quadrupole splitting compared to the unhydrided spectra, but no change in the isomer shift. These data indicate that there is no significant interaction between the tin and the hydrogen. The magnetic character remained the same down to liquid nitrogen temperature as evidenced by the Mössbauer data. X-ray diffraction measurements on the hydride showed an expanded lattice with the same structure as found for the unhydrided sample. A decrease in particle size was observed upon hydriding.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.335114
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  • 10
    Electronic Resource
    Electronic Resource
    Mössbauer and magnetic-susceptibility studies on MmNi4.15Fe0.85 and its hydride (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 67 (1990), S. 5873-5875 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Results are reported on MmNi5−xFex (x=0.85) (Mm=mischmetal) and its hydride from magnetic susceptibility (χ), Mössbauer, and scanning-electron-microscopy studies. The magnitude of χ, the shape of the χ-vs-T curve (50–300 K), and the magnitude of Tc ((approximately-equal-to)200 K) are all close to the values reported for LaNi4Fe. The magnetic properties are significantly changed by the hydriding process. χ (at 100 Oe) above Tc is increased by 100%, whereas at 77 K, χ is lowered by 25%, although Tc is unaffected. The Mössbauer spectra above Tc yield a paramagnetic doublet (isomer shift −0.13±0.01 mm s−1); however, as the temperature decreases, the doublet disappears at 125 K. Hydriding causes only a very small change in the isomer shift.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.345999
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