In physics, the spin–spin relaxation is the mechanism by which Mxy, the transverse component of the magnetization vector, exponentially decays towards its equilibrium value in nuclear magnetic resonance (NMR) and magnetic resonance imaging (MRI).

Spin relaxation refers to the process of the disappearance of initial non-equilibrium spin polarization due to the influence of fluctuating magnetic fields, leading to the forgetting of the initial spin direction over time.

自旋弛豫有两种形式，即自旋-晶格弛豫（spin-lattice relaxation）和自旋-自旋弛豫（spin-spin relaxation）。 1 自旋-晶格弛豫 处于高能态的核自旋体系将能量传递给周围环（晶格或溶剂），自己回到低能态的过程，称为自旋-晶格弛豫，也称为纵向弛豫（ longitudinal ...

Spin–spin relaxation occurs when the interaction between neighboring nuclei with identical precessional frequencies but differing magnetic quantum states occurs. Under spin–spin relaxation, the nuclei have the freedom to exchange quantum states.

2013年11月20日 · Spintronics is an emerging paradigm with the aim to replace conventional electronics by using electron spins as information carriers. Its utility relies on the magnitude of the spin-relaxation,...

Relaxation is the process by which the phase coherence among spins returns to its equilibrium value (as given by the Boltzmann distribution). A spin in a magnetic field simply undergoes Larmor precession. Magnetic moment: ˆμ = γ ! ˆI. Basic principle: spatial and temporal magnetic field variations are the primary source of NMR relaxation.

Spin–spin relaxation is an energy conserving process where the magnetization gets exchanged among the spins, and is dependent on concentration of the spins, the molecular dynamics and the presence of other paramagnetic molecules interacting with them.

During nuclear magnetic resonance observations, spin–lattice relaxation is the mechanism by which the longitudinal component of the total nuclear magnetic moment vector (parallel to the constant magnetic field) exponentially relaxes from a higher energy, non-equilibrium state to thermodynamic equilibrium with its surroundings (the "lattice").

2010年2月14日 · Spin relaxation in organic materials is expected to be slow because of weak spin–orbit coupling. The effects of deuteration and coherent spin excitation show that the spin-relaxation time is...

The spin-spin relaxation is related to spin-lattice relaxation, since an increase in z-magnetization without a decrease in the magnetization in the xy plane is not possible: T 2 ≤ T 1 (in solutions T 2 ≈ T 1 and in solids T 2 << T 1 )