Lodestone unloads a new surprise

Posted on Thursday, December 27th, 02007 by Alexander Rose - Twitter: @zander
link Categories: Clock of the Long Now, Technology   chat 0 Comments

We have been researching long lasting magnetic properties for use in the Clock of the Long Now. Magnetite or lodestone is a naturally occurring magnetic material that has been known for at least two millennia. These materials have held their magnetism even over geologic time scales which makes them interesting for potential use in the Clock. We could potentially use them for actuating/holding without touching thus eliminating wear. I just came across this article on a new property some nano-tech engineers came across when they super cooled magnetite and made it change states into a conductor. I like that such an old material is finding new use in the nano-tech world…

With engineers looking to exploit novel electronic materials for next-generation computers and hard drives, phase transitions between insulating and conducting states have become an increasingly hot research topic in physics and materials science in recent years.

The debate about the causes and specifics of magnetite’s temperature-driven phase change has simmered much longer. Natelson said physicists have long sparred about the possible underlying physical and electronic causes of the phase transition. The discovery of this new voltage-driven switching provides new clues, but more research is still needed, he said.

“The effect we discovered probably wasn’t noticed in the past because nanotechnology is only now making it possible to prepare the electrodes, nanoparticles, and thin films required for study with the precision necessary to document the effect,” he said.

  • http://stargazersjournal.com Roy Kirkland

    Well, it seems to me that the phase change phenomena could be used to create quite an Orrery – the amount of lodestone in the planets and moons could be varied such that an internal heat-absorbing element would warm enough to move the planet bodies by heliocentric coordinate degree according to their actual position, while levitating them from the base at the same time. Another approach could be an electromagnetic pulse from the “Sun” in the center that causes the circuitry of the planets to generate the heat necessary for the adjusted shift (according to the synods of the planets etc.) An Orrery without arms – imagine that! This might also help in future watches that have astral complications, or for that matter, alarm clocks based on the ambient light (temperature of the magnetite changing because of the sunlight available). Anyone interested in these ideas? Please feel free to email me.


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