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  • 1
    Electronic Resource
    Electronic Resource
    Zeeman, hyperfine, and magnetic dipolar effects on the EPR spectrum of a cubic copper tetramer (1986)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 85 (1986), S. 3770-3775 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The Zeeman interaction for an isolated multiplet of a cubic Cu2+ tetramer, characterized by the total spin quantum number S, is shown to be essentially isotropic, with g=(g(parallel)+2g⊥)/3, where g(parallel) and g⊥ are single Cu2+ ion components. Matrix elements are given for the off-diagonal part of the Zeeman interaction within the three S=1 multiplets. The hyperfine structure for each isotope in a [100] direction is shown to be a 13 line structure. The intracluster magnetic dipole–dipole (MDD) interaction has nonzero matrix elements within the three S=1 multiplets, which are degenerate for an isotropic exchange interaction with equal coupling constants. With the MDD interaction treated as a perturbation of the Zeeman interaction, it is found that the single line at g=2.10, expected on the basis of the Zeeman interaction alone, is split into four lines separated from the former line by ±h0 and ±2h0, where h0(approximately-equal-to)480 G. The MDD coupling constant, calculated assuming point dipoles, is an order of magnitude too small to explain the zero-field splitting of the S=2 multiplet measured by EPR in Cu4OCl6(TPPO)4.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.450897
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  • 2
    Electronic Resource
    Electronic Resource
    Selective excitation of magnetostatic modes of a thin film
    Amsterdam : Elsevier
    Physics Letters A 108 (1985), S. 423-425 
    Details
    ISSN: 0375-9601
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0375-9601(85)90285-3
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  • 3
    Electronic Resource
    Electronic Resource
    Thickness and temperature dependence of subsidiary absorption thresholds in yttrium-iron-garnet thin films
    Amsterdam : Elsevier
    Physica A: Statistical Mechanics and its Applications 200 (1993), S. 267-277 
    Details
    ISSN: 0378-4371
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0378-4371(93)90525-9
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  • 4
    Electronic Resource
    Electronic Resource
    NMR of ^2^7 Al in paramagnetic single-crystal DyAl"2
    Amsterdam : Elsevier
    Physics Letters A 95 (1983), S. 252-254 
    Details
    ISSN: 0375-9601
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0375-9601(83)90620-5
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  • 5
    Electronic Resource
    Electronic Resource
    Study of the exchange modes in thick yttrium-iron-garnet films
    Amsterdam : Elsevier
    Physics Letters A 174 (1993), S. 160-164 
    Details
    ISSN: 0375-9601
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0375-9601(93)90561-D
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  • 6
    Electronic Resource
    Electronic Resource
    Movement of Xanthomonas campestris pv. vitians in the stems of lettuce and seed contamination (2002)
    Oxford, UK : Blackwell Science Ltd
    Plant pathology 51 (2002), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Xanthomonas campestris pv. vitians, the causal agent of bacterial leaf spot of lettuce (BLS), can be seedborne, but the mechanism by which the bacteria contaminates and/or infects lettuce seed is not known. In this study, the capacity of X. campestris pv. vitians to enter and translocate within the vascular system of lettuce plants was examined. The stems of 8- to 11-week-old lettuce plants were stab-inoculated, and movement of X. campestris pv. vitians was monitored at various intervals. At 4, 8, 12 and 16 h post-inoculation (hpi), X. campestris pv. vitians was recovered from 2 to 10 cm above (depending on stem length) and 2 cm below the inoculation site. Xanthomonas campestris pv. vitians was also recovered from surface-disinfested stem sections of spray-inoculated plants. Together, these results are consistent with X. campestris pv. vitians invading and moving systemically within the vascular system of lettuce plants. To investigate the mechanism of seed contamination, lettuce plants at the vegetative stage of growth were spray-inoculated with X. campestris pv. vitians and allowed to develop BLS. Seed collected from these plants had a 2% incidence of X. campestris pv. vitians external colonization, but no bacteria were recovered from within the seed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-3059.2002.00730.x
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  • 7
    Electronic Resource
    Electronic Resource
    Susceptibility of ErBa2Cu3O6 single crystal: A dipolar antiferromagnet (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 76 (1994), S. 7468-7472 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The susceptibility of an ErBa2Cu3O6 single crystal was measured at 2 K〈T〈100 K. The low-temperature (T〈10 K) data yield g(parallel)=5.39 and g⊥=7.45. The shapes of the susceptibility curves are well explained by the dipolar fields, calculated for the Er3+ ions in the layered structure of the sample, and by a small contribution of exchange fields. Extending the calculations to the antiferromagnetic state of ErBa2Cu3O6 shows that this material is well described as a two-dimensional dipolar antiferromagnet. The dipolar field calculations are also applied to DyBa2Cu3O6 and GdBa2Cu3O6 and are shown to be compatible with the magnetic structure of these materials. © 1994 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.357975
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  • 8
    Electronic Resource
    Electronic Resource
    Ferromagnetic resonance of double yttrium-iron-garnet films: Perpendicular field (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 67 (1990), S. 2549-2553 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Perpendicular field ferromagnetic resonance spectra of double yttrium-iron-garnet films are presented. The evolution of the spectrum with changing interfilm spacing was traced by performing the measurements at six different spacings. The main features of the observed spectra agree well with those calculated for two films of infinite lateral dimensions by imposing quantization conditions on the in-plane wave-vector components. Some quantitative discrepancies between the observed and calculated spectra are shown to result from the deviation of the depolarization fields in the finite films from the infinite film value and from the inhomogeneity of the magnetic field inside the films.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.345511
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  • 9
    Electronic Resource
    Electronic Resource
    The temperature dependence of the ferromagnetic and paramagnetic resonance spectra in thin yttrium-iron-garnet films (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 70 (1991), S. 2251-2258 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The ferromagnetic resonance (FMR) spectra of an yttrium-iron-garnet (YIG) film were studied from room temperature to 120 K above TC (TC = 553 K). The spectra were measured for a magnetic field parallel to the film as well as perpendicular to it. In the ferromagnetic phase the FMR lines represent the magnetostatic modes whose field positions and spacing are determined by the magnetization of the sample. When anisotropy terms are added to the theoretical expressions for magnetostatic waves of Damon and van de Vaart [J. Appl. Phys. 36, 3453 (1965)] for the perpendicular orientation and of Damon and Eshbach [J. Phys. Chem. Solids 19, 308 (1961)] for the parallel one, a good agreement is obtained between the experimental results and theory. Magnetization values extracted from the FMR spectra are also in good agreement with the published magnetization data for YIG, obtained by a vibrating sample magnetometer. At temperatures higher than 413 K the normalized cubic anisotropy K1/M is found to be practically temperature independent, in contrast with previous studies on YIG spheres which conclude that K1/M → 0 when approaching TC. In the paramagnetic phase we observe an anisotropy in the resonance fields due to the sample shape and the induced magnetization. The linewidths ΔH have also been measured and the product [ΔH − ΔH(TC)] × T is found to be practically linearly dependent on T − TC in a wide range of temperatures. ΔH(TC) is the linewidth at TC. This result is in good agreement with recent experimental studies of paramagnetic YIG linewidths and in fair agreement with Huber's zero-field theory of paramagnetic linewidths near TC of non-Heisenberg ferromagnets, where the "critical speeding-up'' effect is absent [J. Phys. Chem. Solids 36, 723 (1975)].
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.349417
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  • 10
    Electronic Resource
    Electronic Resource
    Electron spin resonance of Er3+ ions in ErzY1−zBa2Cu3O6 : The 5th Joint MMM−Intermag Conference (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 70 (1991), S. 5754-5755 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report electron spin resonance measurements on ErzY1−zBa2Cu3O6 powdered samples for 0.02≤z≤1 at 36 GHz and 1.3〈T〈77 K. For z≥ (R18)0.6 a single highly distorted line, L1, is observed and interpreted in terms of a Kubo–Toyabe stochastic model. For lower z a partially resolved second line appears on the low field side of L1. The data are best represented as the sum of two Kubo–Toyabe lines.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.350150
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