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End date: 2009 × Start date: 2000 × DDC: 540 × Type: article × WGL Institute: IFWD ×

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Now showing 1 - 5 of 5
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    Refinement of the crystal structure of holmium nickel borocarbide, HoNiBC
    (München : R. Oldenbourg Verlag GmbH, 2000) Geupel, S.; Zahn, G.; Paufler, P.; Graw, G.
    BCHoNi, tetragonal, P4/nmm (No. 129), a =3.5621(5) Å, c = 7.556(2) Å, V = 95.9 Å3, Z = 2, Rgt(F) = 0.030, wRref(F2) = 0.076, T= 300 K.
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    New electronic device for driving surface acoustic wave actuators
    (Amsterdam : Elsevier, 2009) Brünig, R.; Mensel, K.; Kunze, R.; Schmidt, H.
    Surface acoustic wave (SAW) actuators are driven by a high frequency signal. The frequency range for an ideal SAW-generation is usually very narrow banded and may shift depending on various environmental conditions. We present a new electronic device which self-aligns to the optimal excitation frequency within a wide range. Any kind of SAW-actuator can be used. The device continuously scans a certain frequency range and characterizes the SAW-component. The ideal excitation frequency is then determined and used to drive the SAW-device. In case of changes like loading conditions or temperature variations the device automatically readjusts to the optimal frequency and prevents possible damage of the device or actuator in case of an error. © 2009.
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    Refinement of the crystal structure of holmium tetranickel boride, HoNi4B
    (München : R. Oldenbourg Verlag GmbH, 2000) Geupel, S.; Belger, A.; Paufler, P.; Graw, G.
    BHoNi4, hexagonal, P6/mmm (No. 191), a = 4.9696(4) Å, c = 6.9419(5) Å, V= 148.5 Å3, Z= 2, ρm = 9.13(1) g·cm-3, R(P) = 0.072, wR(P) = 0.099, R(I) = 0.065, T= 300 K.
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    Crystal structure of tetraholmium nickel tetradecaboride, Ho4NiB14
    (München : R. Oldenbourg Verlag GmbH, 2001) Geupel, S.; Zahn, G.; Paufler, P.; Graw, G.
    B14Ho4Ni, tetragonal, P4/mnc (No. 128), a = 7.2097(8) Å, c = 7.4587(9) Å, V = 387.7 Å3, Z = 2, Rgt(F) = 0.049, wRref(F2) = 0.087, T = 300 K.
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    Refinement of the crystal structure of diholmium trinickel hexaboride, Ho2Ni3B6
    (München : R. Oldenbourg Verlag GmbH, 2000) Geupel, S.; Zahn, G.; Paufler, P.; Graw, G.
    B6Ho2Ni3, orthorhombic, Cmmm (No. 65), a = 7.6865(9) Å, b = 8.6679(9) Å, c = 3.4742(4) Å, V = 231.5 Å3, Z = 2, Rgt(F) = 0.021, wRref(F2) = 0.048, T= 300 K.