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The c-axis of the sample was aligned with an accuracy of ±3° by positioning crystals on a Hall-magnetometer with the aid of an optical microscope. We note that even such small misalignments could have an effect on the tunneling rates, particularly for odd resonances.
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8 to be 1/6, for acicular samples like those investigated. This small ratio appears sufficient to explain the much weaker influence of intermolecular dipolar interactions on the magnetization relaxation in our LZ experiments.
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0011997697
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note
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12 are almost identical [15]. We have included them as only one peak with a height proportional to the sum of the populations of these isomers. We note that this model also includes a small fourth-order transverse anisotropy term.
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