A5009952798- Magnetic properties of thin films
- Physics of Superconductivity and Magnetism
- ZnO doping and properties
- Magnetic and transport properties of perovskites and related materials
- Nonlinear Photonic Systems
- Copper Interconnects and Reliability
- Ferroelectric and Negative Capacitance Devices
- Theoretical and Computational Physics
- Magnetic Properties of Alloys
- Quantum and electron transport phenomena
- Magnetism in coordination complexes
- Semiconductor materials and devices
- Hydrogen Storage and Materials
University of Arizona
2017-2020
We theoretically study magnon transport in an insulating spin valve (ISV) made of antiferromagnetic insulator sandwiched between two ferromagnetic (FI) layers. In the conventional metal-based valve, electron spins propagate metallic layers, giving rise to giant magnetoresistance and transfer torque. Here, incoherent magnons ISV serve as angular momentum carriers are responsible for FI layers across spacer. predict phenomena presence temperature gradient: a magneto-spin-Seebeck effect which...
In magnetic materials, both electrons and magnons are capable of carrying angular momentum currents. An external electric field can efficiently drive a charge spin current electrons, but it is unable to directly produce chargeless magnon current. The generation the conventionally achieved via thermal gradients or electron injection from interfaces. Here, we investigate induced by transfer conduction in layered systems. By using generic exchange interaction between magnons, derive coupled...
For noncollinear antiferromagnetic metals, magnon spectra display nontrivial multiband structure in which both direction and magnitude of the angular momenta magnons are momentum dependent. We study roles these on spin transport properties by taking into account transfer between conduction electrons magnons. have calculated conductivity tensor using coupled Boltzmann equations for electron magnon, we show that unpolarized current driven an electric field can efficiently induce a current. The...
We theoretically study spin-transfer torques in magnetic tunnel junctions (MTJs) with an antiferromagnetic insulator (AFI) as the barrier. When a finite voltage bias is applied to MTJ, energy relaxation of electrons leads asymmetric heating two metallic layers. Consequently, there would be magnon current flowing across AFI layer, resulting transfer torque addition electron torque. Comparing MTJs nonmagnetic which prohibits transmission, we find barrier could several times larger than...