- published: 30 Jul 2008
- views: 644308
Magnetism is a property of materials that respond to an applied magnetic field. Permanent magnets have persistent magnetic fields caused by ferromagnetism. That is the strongest and most familiar type of magnetism. However, all materials are influenced varyingly by the presence of a magnetic field. Some are attracted to a magnetic field (paramagnetism); others are repulsed by a magnetic field (diamagnetism); others have a much more complex relationship with an applied magnetic field (spin glass behavior and antiferromagnetism). Substances that are negligibly affected by magnetic fields are known as non-magnetic substances. They include copper, aluminium, gases, and plastic. Pure oxygen exhibits magnetic properties when cooled to a liquid state.
The magnetic state (or phase) of a material depends on temperature (and other variables such as pressure and applied magnetic field) so that a material may exhibit more than one form of magnetism depending on its temperature, etc.
Aristotle attributed the first of what could be called a scientific discussion on magnetism to Thales of Miletus, who lived from about 625 BC to about 545 BC. Around the same time, in ancient India, the Indian surgeon, Sushruta, was the first to make use of the magnet for surgical purposes.
first time that I met you I could not forget you
from the moment that you appeared
chemical reaction, immediate attraction
you're already pulling me near
you're so fun, my magnetic one
you're my polar opposite
I'll enjoy my magnetic boy
there's no guilt because of it
I tried to resist it, your strange computer soul
follow that fantasy sound
my face, when you kissed it, I think I lost control
all of my faculty's down (2x)
it's like you could see through me, you already knew me
you're always a few steps ahead
now certainly it's seeming you're there when I'm dreaming
you're the song that's stuck in my head
you're so fun, my magnetic one
you're my polar opposite
I'll enjoy my magnetic boy
there's no guilt because of it
I tried to resist it, your strange computer soul
follow that fantasy sound
my face, when you kissed it, I think I lost control
all of my faculty's down (2x)
I follow that fantasy sound
all of my faculty's down
you're so fun, my magnetic one
you're my polar opposite
I'll enjoy my magnetic boy
there's no guilt because of it
(2x)
I tried to resist it, your strange computer soul
follow that fantasy sound
my face, when you kissed it, I think I lost control
all of my faculty's down
all of my faculty's down