| 摘要 |
PCT No. PCT/FR90/00724 Sec. 371 Date Jul. 31, 1991 Sec. 102(e) Date Jul. 31, 1991 PCT Filed Oct. 10, 1990 PCT Pub. No. WO91/05880 PCT Pub. Date May 2, 1991.A method for preparing a sample of a magnetic susceptibility compound chi comprises the steps of providing a vertical magnetic induction B which has a magnetic induction gradient dB/dz and which is such that B.dB/dz has a sign opposite to that to the weight of the sample and such that the magnetic force ( chi .B.dB/dz)/ mu 0 is higher than the weight and heating at a temperature close to the melting temperature.
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