The typical strengths of the external magnetic fields in MRI are enough to keep the magnetizations fixed along the field direction, however, in the case of low magnetic fields, we observed significant enhancement of T2 due to thermal fluctuations of the orientations of magnetizations.
MRAM utilizes the orientation of magnetization of a small magnetic element by the application of magnetic field which gives rise to the change in the electric resistance and enable data bits to be stored.
With the development of techniques for measuring the rock's original orientation of magnetization, a sequence of polarity reversals has been dated for the late Neogene.
Among these systems are distinguished, especially domain walls (DWs) and elements of its internal structure - vertical Bloch lines (BLs; boundaries between domain wall areas with an antiparallel orientation of magnetization) and Bloch points (BPs; intersection point of two BL parts) [1].
In the absence of an external magnetic field, ferromagnetic material does not show any magnetization due to the random orientation of the magnetizations in magnetic domains (Point a, Fig. 1).
This result can be explained by following reason: with E = 0 kV/cm, the orientation of the magnetization was perpendicular to the direction of microwave magnetic field, resulted to the magnetization precession, which was detected a resonance peak.
The probability landscape displays the evolution of the most probable angular orientation of the magnetization vector, for selected temperatures and magnetic fields.
For the film thickness below 40 nm, no magnetic contrast is observed, indicating an in-plane orientation of the magnetization.
Our results demonstrate a correlation between the most probable orientation of the magnetization vector, the system's parameters, and the external magnetic field.
An ultrashort laser pulse causes a rise in temperature that in a couple of thousandths of a nanosecond controllably switches the orientation of the magnetization of an alloy of gadolinium and iron, the researchers report today in Nature Communications.
