Heterodyne interferometer with frequency-modulated laser diode for in- and out-of-plane measurements of vibrations

1998 ◽  
Author(s):  
Pawel Drabarek ◽  
Michael van Keulen ◽  
Siegbert Steinlechner
Keyword(s):  
Laser Diode ◽  
Heterodyne Interferometer ◽  
Out Of Plane

scholarly journals Double heterodyne interferometer using a multimode laser diode

1994 ◽  
Author(s):  
Sen Han ◽  
E. Dalhoff ◽  
Edgar W. Fischer ◽  
S. Heim ◽  
Hans J. Tiziani
Keyword(s):  
Laser Diode ◽  
Multimode Laser ◽  
Heterodyne Interferometer ◽  
Multimode Laser Diode

Optical-heterodyne interferometer insensitive to the changes in laser-diode power

1994 ◽  
Vol 26 (6) ◽  
pp. 425
Author(s):  
Ribun Onodera ◽  
Yukihiro Ishii ◽  
Nobuyuki Ohde ◽  
Yoshitaka Takahashi ◽  
Toshihiko Yoshino
Keyword(s):  
Laser Diode ◽  
Optical Heterodyne ◽  
Heterodyne Interferometer ◽  
Optical Heterodyne Interferometer

Grain separation enhanced magnetic coercivity in Pt/Co multilayers.

1993 ◽  
Vol 51 ◽  
pp. 1038-1039 ◽  
Author(s):  
G.A. Bertero ◽  
R. Sinclair
Keyword(s):  
Remanent Magnetization ◽  
Strong Influence ◽  
Uniaxial Anisotropy ◽  
Magnetic Coupling ◽  
Recording Media ◽  
Magnetic Media ◽  
Signal To Noise ◽  
Out Of Plane ◽  
Longitudinal Recording ◽  
The Relationship

Pt/Co multilayers displaying perpendicular (out-of-plane) magnetic anisotropy and 100% perpendicular remanent magnetization are strong candidates as magnetic media for the next generation of magneto-optic recording devices. The magnetic coercivity, Hc, and uniaxial anisotropy energy, Ku, are two important materials parameters, among others, in the quest to achieving higher recording densities with acceptable signal to noise ratios (SNR). The relationship between Ku and Hc in these films is not a simple one since features such as grain boundaries, for example, can have a strong influence on Hc but affect Ku only in a secondary manner. In this regard grain boundary separation provides a way to minimize the grain-to-grain magnetic coupling which is known to result in larger coercivities and improved SNR as has been discussed extensively in the literature for conventional longitudinal recording media.We present here results from the deposition of two Pt/Co/Tb multilayers (A and B) which show significant differences in their coercive fields.

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