This should appeal to all of you magnetic device researchers
When the current is sent through tantalum's atomic core, the metal's physical properties naturally sort the electrons to opposing sides based on their direction of spin. This creates the polarization researchers exploited to switch magnets in a logic circuit without the need for a magnetic field.[/font]
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http://revolution-green.com/2013/11/20/breakthrough-help-magnets-end-era-computer-transistors/ (http://revolution-green.com/2013/11/20/breakthrough-help-magnets-end-era-computer-transistors/)
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i do not even know about the specifics, but i can tell, if current allows a magnetic fields switch - and - in terms of energy input the switched field is >> larger than the inputed power as a current then we are closer to a "magnetic transistor" and with the help of permanent magnets closer to an OU device, magnet based.