I spin magnetization

All of this can be expressed in a more compact way if we introduce the I and S spin z-magnetizations. The I spin magnetization is equal to the population difference across the two I spin transitions, 1-3 and 2-4... 

What this says is that if the S spin magnetization deviates from equilibrium there will be a change in the I spin magnetization at a rate proportional to (a) the cross-relaxation rate, aIS and (b) the extent of the deviation of the S spin... 

The S spin magnetization returns to its equilibrium value with what appears to be an exponential curve in fact it is the sum of two exponentials but their time constants are not sufficiently different for this to be discerned. The I spin magnetization grows towards a maximum and then drops off back towards the equilibrium value. The NOE enhancement is more easily visualized by plotting the difference magnetization, (I, - /z°)//z°, on an expanded scale the plot now shows the positive NOE enhancement reaching a maximum of about 15%. 

Figure 6 illustrates the pulse sequence for INEPTRD. pi excites the I spin magnetization, d2, p2, d2, and p5 create... 

Heteronuclear correlation (HETCOR) solid-state NMR spectroscopy [54] has been widely used to provide information on the spatial proximity of different nuclei in complex spin systems. When more than one distinct / and/or S spin species is present, a 2D correlation experiment enables the detection of dipolar couplings between specific distinct IS pairs. Typically, the experiment consists of a 90° pulse that creates transverse I spin magnetization, which evolves for a time tj before it is transferred to spin S, usually via CP. The S spin FID is then detected in t2- 2D Fourier transform yields a 2D spectrum, with the appearance of cross peaks between individual I and S resonances from spins which are dipolar coupled. 

The majority of octahedral ferric complexes exhibit simple Curie or Curie-Weiss magnetic behavior (i.e., magnetic susceptibility 1/7. They can be classified as either "high spin or "low spin. In high-spin complexes, the lowest term (ground state) is Aig, which corresponds to the tag eg2 configuration. The low-spin complexes have the Tgg term as... 

I (1) Magnetic spin of a nucleus, angular MAU Weight average molecular weight Milliabsorbance unit... 

Lanthanide ions offer several salient properties that make them especially attractive as qubit candidates (i) their magnetic states provide proper definitions of the qubit basis (ii) they show reasonably long coherence times (iii) important qubit parameters, such as the energy gap AE and the Rabi frequency 2R, can be chemically tuned by the design of the lanthanide co-ordination shell and (iv) the same molecular structure can be realized with many different lanthanide ions (e.g. with or without nuclear spin), thus providing further versatility for the design of spin qubits or hybrid spin registers. 

Abstract This review deals with spin crossover effects in small polynuclear clusters, particularly dinuclear species, and in extended network molecular materials, some of which have interpenetrated network structures. Fe(II)Fe(II) species are the main focus but Co(II)Co(II) compounds are included. The sections on dinuclear compounds include short background reviews on (i) synergism of SCO and spin-spin magnetic exchange (ii) cooperativity (memory effects) in polynuclear compounds, and (iii) the design of dinu-... 

Magnetization is initially transferred from 1Hn(i) to 15N(/) spin. Unlike in the HNCA-TROSY scheme, the desired coherence is transferred from the 15N(i) spin to the 13C7(/ — 1) spin of the preceding residue. To this end, nearly uniform fNc( 15 Hz) scalar coupling is used. As 2/NC is negligibly small, the coherence is transferred exclusively to the 13C (/ — 1) nucleus. Finally, the 13C —13C INEPT is used to transfer magnetization from 13C (i— 1) to... 

The eigenvalue equation corresponding to the Hamiltonian of Eq. [57] can be solved self-consistently by an iterative procedure for each orientation of the spin magnetization (identified as the z direction). The self-consistent density matrix is then employed to calculate the local spin and orbital magnetic moments. For instance, the local orbital moments at different atoms i are determined from... 

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