Weak magnetism

Although continuous wave NMR is sufficient for naturally abundant nuclei with strong magnetic moments such as hydrogen, fluorine and phosphorous, the study of low abundance nuclei and/or weak magnetic moments such as carbon 13 or silicon 29 requires pulse NMR. 

Above the solution treatment temperature (ca 1250°C), the alloy is single phase with a bcc crystal stmcture. During cooling to ca 750—850°C, the sohd solution decomposes spinodally into two other bcc phases a and lattice parameter composition. The matrix a-phase is rich in Ni and Al and weakly magnetic as compared with which is rich in Fe and Co. The a -phase tends to be rod-like in the (100) dkection and ca 10 nm in diameter and ca 100 nm long. As the temperature is decreased, segregation of the elements becomes mote pronounced and the difference between the saturation polarizations of the two phases increases. 

Induced rolls Electromagnet 20,000 200,000 Strongly 0.0.3-3 Dry, dedusted, weakly magnetic particles... 

Irregular attack t and M, magnetic W, weakly magnetic N, non-magnetic. 

A Family of Asymmetric [Ln2] Complexes with Weak Magnetic Coupling... 

A very promising prospect is also the possibility of working with molecules containing more than one lanthanide. The combination of weak magnetic interactions, typical of lanthanides and of dissimilar local coordination environments... 

Another example of systems where the pattern formation is observed is a two-dimensional electron liquid in a weak magnetic field with partially filled upper Landau levels. In such systems the uniform distribution of the charge density at the upper Landau level is unstable against the formation of a charge density... 

One device is made up of samples of superconducting materials put inside a transformer a low-frequency small current in the primary creates a weak magnetic field. 

In the second region, relatively far from the particle, the refocusing pulses are effective, which corresponds to a weak magnetization condition. The relaxation rate can then be analyzed following Majumdar and Gore 26). The result of this calculation is in remarkable agreement with the slow rates, obtained from simulated multiexponential decays 27) ... 

To increase the ionization probability, a homogeneous weak magnetic field is used to keep the electrons on a spiral path. At the end of the ionization chamber, electrons are collected in a positively charged trap, where the electron current is measured and kept constant by the emission regulator circuitry. 

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