Ferromagnetic semiconductor (In,Ga,Mn)As with Curie temperature above 100 K

WIMP dark matter detectors above 100 K

Of key motivation in the development of detector strategies in the search for Weakly Interacting Massive Particles (WIMPs) is the need to maximize the information obtainable from the expected elastic recoil events so that these can be distinguished from background interactions and systematic errors can be controlled. Low temperature techniques may provide one route. However, most of the detecto...

Electronic States and THz Dynamics in Ferromagnetic InGaMnAs

We have measured the picosecond transient carrier response of InGaMnAs/InP and InGaAs/InP by two-color pump-probe spectroscopy, using an intense near-infrared beam as the pump and a 52.5 μm (5.7 terahertz) beam as a probe. We observed anomalies in the dynamics of photocreated carriers in the Mn-doped sample, especially at high pump fluences and low temperatures. Our band structure calculations ...

Temperature-dependent magnetization in a ferromagnetic bilayer consisting of two materials with different Curie temperatures

A structure-dependent self-consistent mean-field model has been used to calculate the temperaturedependent magnetization in ferromagnetic bilayers that consist of two materials with different Curie temperatures. The magnetization versus temperature curves fSsTdg are found to be structure sensitive among the bilayer systems with simple cubic, face-centered-cubic, and body-centered-cubic structur...

Using ferromagnetic nanoparticles with low Curie temperature for magnetic resonance imaging-guided thermoablation

INTRODUCTION Magnetic nanoparticles (NPs) represent a tool for use in magnetic resonance imaging (MRI)-guided thermoablation of tumors using an external high-frequency (HF) magnetic field. To avoid local overheating, perovskite NPs with a lower Curie temperature (T c) were proposed for use in thermotherapy. However, deposited power decreases when approaching the Curie temperature and consequent...

Josephson Current in a Ferromagnetic Semiconductor/Semiconductor/Ferromagnetic Semiconductor Junction with Superconducting Contacts