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  Journal of Spectroscopy and Dynamics 2013, 3: 18
  Research Article
Ho3+ complexes in KHo(WO4)2 single crystals
  S. M. Kaczmareka, H. Fuksa, T. Skibinskia, G. Lenieca, J. Hanuzab, L. Macalikb, A. Majchrowskic  
a Faculty of Mechanical Engineering and Mechatronics, Institute of Physics, West Pomeranian University of Technology, Al. Piastów 48, 70-320 Szczecin, Poland
b Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P. O. Box 1410, 50-950 Wroclaw, Poland
c Institute of Applied Physics, Military University of Technology, 2 Kaliskiego, 00-908 Warszawa, Poland

  Well oriented KHo(WO4)2 single crystal has been investigated by means of very sensitive EPR technique. Low temperature EPR spectra collected at three perpendicular planes of the crystal rotation allowed to find out information about the nature and local symmetry of detected magnetic centers. g matrix has been calculated, including its principal values as well as space orientation. As trivalent holmium ions are expected to be EPR silent, observed signal is attributed to different type of complex holmium magnetic systems, arranged with help of some defects like vacancies of W6+ ions.
  Double tungstates; Single crystals; Holmium; EPR; Magnetic complexes  

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