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  • 1
    Electronic Resource
    Electronic Resource
    Local density approximation of magnetocrystalline anisotropy: An approach for narrowband materials : The 40th annual conference on magnetism and magnetic materials (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 4808-4810 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We exploit the purely magnetocrystalline response associated with the Goldstone excitation of a spontaneously magnetized system in order to describe, within a local density approach, the ground state interaction between a local magnetic moment and its surroundings, whose origin is in strong short-range (on-site) electron interactions and the hybridization of localized states. The idea is to consider an applicable form for the ground state energy, and therefore the magnetic anisotropy energy, beyond the local spin density approximation, which might be inferred from existing models of narrowband materials. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.361614
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  • 2
    Electronic Resource
    Electronic Resource
    Temperature-dependent non-Heisenberg exchange coupling of ferromagnetic layers (invited) : 38th Annual Conference on Magnetism and Magnetic Materials (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 75 (1994), S. 6163-6168 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We consider with temperature the exchange coupling of two identical ferromagnetic films separated by a paramagnetic metal of thickness d. The minority-spin band of the ferromagnets is matched to the band of the paramagnet. Majority-spin electrons experience a repulsive potential of maximum height equal to the exchange gap of the ferromagnets. A spin-flip current, which flows as a result of a virtual rotation of the ferromagnetic moments, is calculated at temperature T, assuming single-particle excitations only. This current, equated to the torque exerted by one ferromagnet on the other, defines the exchange energy as an infinite sum of terms with coefficients A12(d,T),B12(d,T),..., extending beyond the Heisenberg-like A12(d,T) term. For certain d, the biquadratic B12(d,T) term is of the proper magnitude and sign to cause intrinsic 90° coupling between the moments of the two ferromagnets. Additionally, we calculate the T dependence of A12(d,T) and B12(d,T) for different Fermi energy to exchange-gap ratios, showing that, in general, a nonmonotonic dependence of both A12(d,T) and B12(d,T) vs T is expected. Monotonic T dependence occurs in the asymptotic regime of large d.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.355445
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  • 3
    Electronic Resource
    Electronic Resource
    Calculation of the magnetocrystalline anisotropy energy using a torque method : The 41st annual conference on magnetism and magnetic materials (1997)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 81 (1997), S. 3869-3871 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We calculate the torque on a magnetic moment with arbitrary orientation in a solid and use it to calculate the magnetocrystalline anisotropy energy (MAE) of bulk materials by integrating the torque along an angular path connecting the easy and hard magnetization directions. We apply this approach to the calculation of the MAE of elemental ferromagnets Ni and Fe using a tight-binding model with an added spin-orbit-coupling (SOC) term λSOL⋅S. The MAE for both Fe and Ni is computed for a wide range of values of the SOC strength. Our results for the MAE calculated with the torque method agree with the MAE determined from energy differences. The convergence rate as a function of k-vector needed for integrating over the Brillouin zone for the torque method is comparable to the convergence rate of conventional energy difference schemes. We compare the calculated torque as function of angle to the lowest order term in the expansion in anisotropy constants. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.364737
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  • 4
    Electronic Resource
    Electronic Resource
    Surface roughness and long-range order of a semi-infinite ferromagnet : 37th Annual conference on magnetism and magnetic materials (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 73 (1993), S. 5981-5983 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We consider the effect of random surface roughness on a semi-infinite ferromagnetic film. We calculate the magnetization as a function of distance from the surface and the spin-spin correlation as a function of lateral separation. We show that, even in the absence of crystalline anisotropy or an external field, the surface of the ferromagnet is stable against random torques created by the roughness. Near the surface, the magnetization reduction is inversely proportional to the square of a "healing'' length λ0≡(D/2πM0)1/2, where D is an exchange stiffness and M0 is the saturation magnetization. The correlations in fluctuations of the magnetization orientation decay exponentially with distance parallel to the surface, λ0 being in the exponent. In contrast, fluctuations decrease only as the reciprocal of the square of the distance perpendicular to the surface. Results are discussed and compared with other calculations of the effects of random surface perturbations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.353490
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  • 5
    Electronic Resource
    Electronic Resource
    H-2 AND NON -H-2 DETERMINED STRAIN VARIATION IN PALATAL SHELF AND TONGUE ADENOSINE 3’:5’CYCLIC MONOPHOSPHATE: A POSSIBLE ROLE IN THE ETIOLOGY OF STEROID-INDUCED CLEFT PALATE (1979)
    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 6 (1979), S. 0 
    Details
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: The concentration of cAMP was measured in palatal shelves and tongues of 14.5-day old foetuses, 14.5-day old foetuses from steroid treated mothers, and 15.5-day old foetuses from four inbred lines of mice which represent the four possible combinations of two H-2 alleles and two residual genetic backgrounds. The incidence of spontaneous and steroid-induced cleft palate in these four strains was also determined. Analyses of variance of the cAMP data reveal that both the H-2 region and residual genetic background determine cAMP concentrations in both tissues and on both days of development. Similar analyses of cAMP concentrations after steroid treatments of the mother indicate that the interaction between H-2 and residual genetic background is significantly different in the injected than in the uninjected mice in both palatal shelves and tongues. The incidence of steroid-induced cleft palate parallels the palatal shelf concentration of cAMP before steroid treatment of the mother with one exception. These data suggest that a portion of the H-2 controlled component of susceptibility to steroid-induced cleft palate is mediated through alterations in the metabolism of cAMP.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1744-313X.1979.tb00682.x
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  • 6
    Electronic Resource
    Electronic Resource
    GENE EXPRESSION OF A REGION OF CHROMOSOME 17 DURING MURINE SPERMATOGENESIS (1977)
    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 4 (1977), S. 0 
    Details
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: The presence of H-2-linked gene products on spermatozoa and their time of appearance during spermatogenesis was determined. Thymus leukaemia antigen specificities 1, 2 and 3 could not be detected on spermatozoa by absorption of the antisera. Immunofluorescent studies with anti-Sip sera did not reveal any specific reactivity with target spermatozoa. In contrast, H-2D antigens were present on somatic as well as germ line components in testes so the time of their first appearance during spermatogenesis could not be precisely specified. Cell separation experiments indicate that H-2D antigens are present on pachytene spermatocytes and increased in quantity on spermatids. The sperm-specific isoenzyme of phosphoglycerate kinase, Pgk-2, appears at a later stage of spermatogenesis than do the H-2 region antigens.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1744-313X.1977.tb00918.x
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  • 7
    Electronic Resource
    Electronic Resource
    ABSORPTION ANALYSIS OF H-2D AND K ANTIGENS ON SPERMATOZOA (1977)
    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 4 (1977), S. 0 
    Details
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: The presence of H-2D and K antigens on mouse spermatozoa has been investigated by absorption followed by testing on the proper target lymphocytes. It is concluded that, in addition to Ia antigens, H-2D and K antigens are indeed expressed on mouse sperm cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1744-313X.1977.tb00613.x
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  • 8
    Electronic Resource
    Electronic Resource
    FAILURE TO DETECT ASSOCIATION OF ISOLATED CLEFT PALATE WITH HLA ANTIGENS (1985)
    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 12 (1985), S. 0 
    Details
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: HLA antigen frequencies have been determined in 282 controls and in 33 individuals with isolated cleft palate or the related birth defect velopharyngeal incompetence. No association of particular HLA antigens with this birth defect was found. A previously reported association of HLA A2 with cleft palate, in males, was not confirmed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1744-313X.1985.tb00853.x
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  • 9
    Electronic Resource
    Electronic Resource
    A Unique RNA Species from Maturing Mouse Spermatozoa (1973)
    [s.l.] : Nature Publishing Group
    Nature 242 (1973), S. 114-115 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The epididymis and ductus deferens were dissected from mature random bred Swiss mice and placed in a small Petri dish. Spermatozoa were stripped from the ductus deferens, and the epididymides were chopped with a sharp razor blade. The chopped tissue was suspended in 4 ml./mouse of Beatty's media9, ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/242114a0
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  • 10
    Electronic Resource
    Electronic Resource
    Regional and strain variation in brain 3′∶5′ cyclic adenosine monophosphate of inbred mice (1979)
    Springer
    Cellular and molecular life sciences 35 (1979), S. 1025-1026 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Regional variations were found in cAMP levels in flash frozen mouse brains with the pons and cerebellum having higher levels than the cerebrum. There were also strain variations with CBA/J and BALB/cJ having higher levels than C57B1/6J in the pons and cerebellum.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01949919
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