Gadolinium Magnet Generator.

[synchro1]

A Gadolinium sample, suspended by a string and attracted to a pair of neo's off to the side at an angle, should drop away when heated above the Curie point then re-attract after it cools down.

The small amount of heat required to pass over the Curie point, depending on the starting temperature, might be less then the pendulum force measured in both directions.

[TinselKoala]

See Telsa's patent # 396,121.

Here's a discussion, with some designs:
http://www.douglas-self.com/MUSEUM/POWER/thermomagnetic/thermag.htm

I don't think Gadolinium will drop away like you think. Nickel certainly will but takes more heating. I don't know what is in "lighter flints" that will make them work as in the design in the link, but it might be interesting to try.

[profitis]

Gadolinium is a hot contender for a 2nd law violation because of its large temperature changes when flung in and out of magnetic fields,regardless wether they be one pole magnet,two pole magnet,neo,or otherwise. If we wrap a copper coil around gadolinium and fire it briefly on the battery we are going to get much more cooling effect than with a ferrite rod.much more of a backshot spark the moment the domains re-randomize and suck in enormous amount of heat direct from the ambient.it is going to suck in more heat from the ambient than was given to the ambient by us.

[Hope]

Phase Change Magnetics is worth looking into. 

[synchro1]

Heating the permanent magnet above the currie point: