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  • 1985-1989  (3)
Source
Material
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Nuclear orientation and nuclear spin-lattice relaxation in insulating magnetically ordered crystals (1988)
    Springer
    Hyperfine interactions 43 (1988), S. 311-318 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The mechanism of nuclear spin-lattice relaxation in insulating magnetically ordered crystals at low temperatures is discussed. In 3-dimensional systems the relaxation time T1 is long, but in the lower dimensional systems it can be quite short making them possible candidates for hosts in on-line experiments. An experiment in 2-dimensional54Mn−Mn (COOCH3)2·4H2O is discussed with particular reference to the relatively short value of T1 in low applied fields. A preliminary experiment in the 1-dimensional system54Mn−(CH3)4NMnCl3 (TMMC) is also described. Pulsed NMRON measurements in54Mn−MnCl2·4H2O are outlined and the advant-systems with fast relaxation emphasized.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02398311
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Pulsed nuclear magnetic resonance of oriented nuclei in an insulating magnetic material:54Mn−MnCl2.4H2O (1987)
    Springer
    Hyperfine interactions 36 (1987), S. 161-170 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The first observation of pulsed nuclear magnetic resonance of oriented nuclei in an insulating magnetic material is reported. The system studied was the ordered antiferromagnet54Mn−MnCl2.4H2O. The response of the54Mn spins to a single pulse of variable length, the free induction decay, and Hahn spin-echo have all been observed. A discussion of the transverse decoherent relaxation timeT 2 in MnCl2.4H2O is given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02395349
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Nuclear spin-lattice relaxation in54Mn-MnCl2.4H2O and lower dimensional magnetic systems (1989)
    Springer
    Hyperfine interactions 51 (1989), S. 1111-1118 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We report on nuclear spin-lattice relaxation studies on54Mn-MnCl2.4H2O and 2-dimensional54Mn-Mn(COOCH3)2.4H2O. In the former crystal, we find that at the lowest temperatures a direct process, normally thought of as forbidden, becomes the mechanism for relaxation. In lower dimensional systems the relaxation might be expected to be relatively fast and indeed in the acetate the relaxation timeT 1 is ≈1000 s in an applied field of 0.2 T for the Mn2 site and is much shorter at lower fields. In 1-dimensional54Mn-(CH3)4NMnCl3(TMMC) a significant γ-ray anisotropy is observed on cooling indicating thatT 1 is also short in this system. The shortness ofT 1 in the lower dimensional systems suggests that they may be suitable hosts for on-line experiments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02407836
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    Paper (German National Licenses)
    Fulltext
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