Ultrafast Manipulation of Spins in Antiferromagnetic Materials: New Avenue in Magnetic Memory?
نویسندگان
چکیده
منابع مشابه
Multiple-stable anisotropic magnetoresistance memory in antiferromagnetic MnTe
Commercial magnetic memories rely on the bistability of ordered spins in ferromagnetic materials. Recently, experimental bistable memories have been realized using fully compensated antiferromagnetic metals. Here we demonstrate a multiple-stable memory device in epitaxial MnTe, an antiferromagnetic counterpart of common II-VI semiconductors. Favourable micromagnetic characteristics of MnTe allo...
متن کاملCoherent terahertz control of antiferromagnetic spin waves
Ultrafast charge and spin excitations in the elusive terahertz regime1,2 of the electromagnetic spectrum playa pivotal role in condensed matter3-13• The electric field of free-space terahertz pulses has provided a direct gateway to manipulating the motion of charges on the femtosecond timescale6-9 • Here, we complement this process by showing that the magnetic component of intense terahertz tra...
متن کاملUltrafast and reversible control of the exchange interaction in Mott insulators
The strongest interaction between microscopic spins in magnetic materials is the exchange interaction Jex. Therefore, ultrafast control of Jex holds the promise to control spins on ultimately fast timescales. We demonstrate that time-periodic modulation of the electronic structure by electric fields can be used to reversibly control Jex on ultrafast timescales in extended antiferromagnetic Mott...
متن کاملPossible magnetic-polaron-switched positive and negative magnetoresistance in the GdSi single crystals
Magnetoresistance (MR) has attracted tremendous attention for possible technological applications. Understanding the role of magnetism in manipulating MR may in turn steer the searching for new applicable MR materials. Here we show that antiferromagnetic (AFM) GdSi metal displays an anisotropic positive MR value (PMRV), up to ~415%, accompanied by a large negative thermal volume expansion (NTVE...
متن کاملDetermination of antiferromagnetic coupling constants in the spin-dimer compound β-Sr2Cu(BO3)2
Electron Spin Resonance was used to study the spin-dimer compound β-Sr2Cu(BO3)2. The value of the antiferromagnetic coupling constant (J) between the copper dimers was estimated from temperature-dependence measurements to be 92 K at a frequency of 111.3 GHz and 91 K at a frequency of 66.7 GHz. Introduction From refrigerator magnets to hard drives, magnetism is a familiar phenomenon. The source ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2017