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  • 1
    Electronic Resource
    Electronic Resource
    Field dependence of Young’s modulus in a gadolinium single crystal (1998)
    Springer
    Journal of experimental and theoretical physics 87 (1998), S. 1148-1153 
    Details
    ISSN: 1090-6509
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The field dependence of Young’s modulus along the hexagonal c axis is measured in a gadolinium single crystal over a wide range of temperatures and magnitudes of the magnetic field aligned with the c axis. It is found that the isotherms of the field dependence of the ΔE effect in gadolinium are well approximated by a linear dependence on the square of the magnetization in both strong and weak strong magnetic fields, and also above and below the spin reorientation temperature. It is shown that the experimental trends obtained near the ferromagnetic transition can be interpreted within the approach based on the Landau theory of second-order phase transitions. The parameters of such an approach are determined for gadolinium on the basis of the experimental data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.558606
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  • 2
    Electronic Resource
    Electronic Resource
    Magnetic and crystalline properties of GdxLa1−x FeSi compounds (1997)
    Springer
    Physics of the solid state 39 (1997), S. 284-287 
    Details
    ISSN: 1063-7834
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The magnetic and crystalline properties of the polycrystalline compounds GdxLa1−x FeSi (x=0, 0.1, 0.3, 0.45, 0.55, 0.65, 0.8, 1) and single crystal GdFeSi are studied. All the compounds have the CeFeSi tetragonal structure. The temperature dependences of the magnetization and initial susceptibility show that ferromagnetic behavior is characteristic of these compounds; the exception is the Pauli paramagnetic LaFeSi. Substitution of gadolinium by the nonmagnetic lanthanum leads to a sharp drop in the Curie temperature T c, and to a reduction in the saturation magnetic moment μ 0, effective magnetic moment μ eff, and paramagnetic Curie temperature Θp. Measurements on single crystal GdFeSi imply that the easy magnetization axis of this compound is the c axis and the anisotropy field is H a∼4 kOe. No magnetic moment was observed on the iron ion in any of these compounds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.1129800
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  • 3
    Electronic Resource
    Electronic Resource
    Magnetic properties of the compounds R2Sc3Si4 (R=Gd, Tb, Dy, Ho, Er) (1999)
    Springer
    Physics of the solid state 41 (1999), S. 1656-1657 
    Details
    ISSN: 1063-7834
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The magnetization of R2Sc3Si4 compounds is measured in static magnetic fields up to 14 kOe in the temperature range 77–300 K. It is established that all compounds in the given series are paramagnetic at these temperatures. The paramagnetic Curie points are determined, and the effective magnetic moments are calculated. The measurements are performed on polycrystalline samples.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.1131048
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  • 4
    Electronic Resource
    Electronic Resource
    Magnetic properties of GdxLa1−x CoSi (1997)
    Springer
    Physics of the solid state 39 (1997), S. 1128-1131 
    Details
    ISSN: 1063-7834
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The magnetic properties and crystal structure of GdxLa1−x CoSi compounds (x=0, 0.25, 0.5, 0.65, 0.8, 1) are investigated. The anisotropy of the magnetic properties are analyzed for a GdCoSi single crystal. The temperature dependences of the magnetic susceptibility and the tetragonal lattice parameters of GdCoSi are characterized by anomalies in the vicinity of the magnetic phase transition temperatures, 166 K and 300 K. The Néel temperatures, the effective magnetic moments, and the paramagnetic Curie temperatures of these compounds decrease as gadolinium is replaced by lanthanum. The compound LaCoSi is a Pauli paramagnet. The results are discussed on the basis of a model that takes into account the presence of positive and negative exchange interactions and the itinerant magnetism of the cobalt sublattice.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.1130029
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  • 5
    Electronic Resource
    Electronic Resource
    Magnetic anisotropy of YFe11Ti and its hydride (1998)
    Springer
    Physics of the solid state 40 (1998), S. 258-262 
    Details
    ISSN: 1063-7834
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A study of the magnetic anisotropy of single-crystal YFe11Ti and of its hydride is reported. The measurements were performed on a vibrating-sample and a torsion magnetometer on field-oriented single-crystal and powder samples. The temperature dependence of the magnetic anisotropy constants K 1 and K 2 was determined by a mathematical treatment of experimental torque curves and by applying the Sucksmith-Thompson technique to magnetization data. It is shown that the temperature dependence of the magnetic anisotropy constants of YFe11Ti and of its hydride does not follow the prediction of the single-ion exchange model. It is found that hydrogenenation results in a growth of the magnetic anisotropy constant, which can be explained by an electron-density redistribution near the lattice positions occupied by iron atoms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.1130288
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  • 6
    Electronic Resource
    Electronic Resource
    Magnetostriction in the vicinity of spin-reorientation phase transitions in singlecrystal DyFe11Ti (1999)
    Springer
    Physics of the solid state 41 (1999), S. 1508-1510 
    Details
    ISSN: 1063-7834
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The field, temperature, and angular dependences of longitudinal λ‖ and transverse λ⊥ magnetostriction in single-crystal DyFe11Ti are investigated. Tensometric measurements were made in the temperature range from 78 to 300 K in magnetic fields up to 12 kOe. Measurements of the magnetostriction of single-crystal DyFe11Ti, YFe11Ti, and LuFe11Ti imply that the sublattice of 3d transition metals makes only a small contribution to the magnetostriction in compounds RFe11Ti, and that the primary contribution to the magnetostriction of these compounds comes from the rare-earth metal sublattice. The primary microscopic mechanism for magnetostriction is single-ion magnetostriction caused by the interaction of the anisotropic orbital electron cloud around the Dy3+ magnetic ion with the crystal field of the lattice.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.1131012
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  • 7
    Electronic Resource
    Electronic Resource
    Magnetoelastic properties of gadolinium (1992)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 72 (1992), S. 4247-4249 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The results of an investigation of the temperature and magnetic field dependencies of the Young's modulus E and the internal friction Q−1 in the temperature region 4.2–350 K and the magnetic field up to 14 kOe for a single crystal (c axis) and polycrystalline samples of gadolinium are presented. The experiments were carried out by the flexural vibrating-reed method at frequencies ∼1 kHz. Anomalies in temperature dependencies of the Young's modulus for single crystal and polycrystalline gadolinium in regions of the paramagnetism-ferromagnetism phase transition and spin-reorientation (SR) transition are accompanied by an abrupt increase of the internal friction. In the SR transition range a considerable temperature hysteresis of the internal friction has been observed. This hysteresis is connected with the coexistence of phases having different magnetic ordering. The ΔE effect has been studied in detail.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.352237
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  • 8
    Electronic Resource
    Electronic Resource
    Magnetization of nanocrystalline dysprosium: Annealing effects (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 8584-8587 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The magnetization of dysprosium (Dy) in its different structures (from a nanocrystalline one to a coarse grained structure) is investigated. In the nanocrystalline state Dy is ferromagnetic up to a temperature 160 K and no antiferromagnetism is detected at any temperature when Dy is in an intermediate structural state, coexistence of the ferro- and antiferromagnetic orders is observed in the temperature range from 110 to 160 K. Finally, magnetic properties of coarse-grained Dy coincide with those reported in literature for the bulk. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.362478
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  • 9
    Electronic Resource
    Electronic Resource
    Anomalously high entropy change in FeRh alloy (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 1689-1695 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The temperature dependences of heat expansion, elastocaloric effect, magnetocaloric effect, and the shift in the critical temperature of the transition due to tensile stress have been measured using samples of the same concentration Fe49Rh51 in the antiferromagnetic-ferromagnetic (AF-F) transition range. Using data on specific heat and magnetocaloric effects, entropy-temperature diagrams for the alloy were made for various magnetic fields. The ratios ΔS(TcH)/TcH, where ΔS(TcH) is the entropy change during transition and TcH is the transition's critical temperature, were found to be ∼3.98×102 erg/g K2 which is close to the value of the change in the electronic specific heat coefficient Δγ obtained by other researchers. It has been concluded that the change in the electronic part of entropy is the main mechanism of the transition. The phenomenological model is proposed, taking into account the electronic entropy change during the transition. Calculations using the model give values for the main thermodynamic parameters of the transition (free energy change ΔF=1.91×106 erg/g, the critical temperature shift ∂Tc/∂P=3.08×10−9 K cm2/Dyn and ∂Tc/∂H=0.788 K/kOe due to hydrostatic pressure and magnetic field respectively), which are in agreement with experimental data. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.360955
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  • 10
    Electronic Resource
    Electronic Resource
    Dynamics and spatial boundaries of retardation of the plasma cloud of an explosion in a dipole magnetic field (1993)
    Springer
    Journal of applied mechanics and technical physics 34 (1993), S. 745-751 
    Details
    ISSN: 1573-8620
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00852074
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