Does temperature affect magnet’s strength?
What are Magnets: Magnets are devices that
attract iron and produce a magnet field. (Diagram 1)It a piece of iron or
steel, that possesses the property of attracting certain substances as iron,
nickel and cobalt. We use magnets on our refrigerator, white board, chalk board
and others mostly to stick something up.
What are magnets made of: Magnets
are made of alloys of magnetic materials, which are nickel (diagram 2), iron
(diagram 3), and cobalt (diagram 4). When these materials are exposed to a
magnetic field, the structure of the material is actually changed on a
microscopic level. The molecules are polarized, or rearranged into lines. When
enough of the metal is polarized, it becomes a magnet. Making magnets is
possible with Dowling’s magnet science projects and other educational products.
Temperature & Magnet: The temperature does affect the magnet’s
strength. You can know the temperature by a thermometer (diagram 5). So if you
put a magnet in different temperature you will find out that it will hold
different amount of paper clips. From the amount of paper clip that magnets hold you
can know the strength.
Cold Temperature & Magnet: When you put a magnet in a colder temperature
the strength of the magnet will get stronger. It is because cold can effect of
how fast a charged practical moves. A magnet is made of things that produces
magnet field. When you cool a metal it can make the motion within less random
and allowing more atoms to line up with each other. This will increase the
magnet field. So the strength of the magnet will get stronger.
Hot temperature & Magnet: However it gets weaker if you put a magnet in a warm temperature. The strength of the magnet gets weaker from when the temperature goes up to 80°C. The strength gets weaker, because it decreases the magnet field. As the temperature rises, the additional heat provides more kinetic energy to allow some of the domains to randomly re-align, which subtracts from the overall strength of the magnet. As temperature rises further, then more and more domains become non-aligned and the magnetic strength decreases further. After more times there will be very less magnet field left.
So if you put a magnet in a cold place it will get strong because there will be more magnet field. But if you put it in a hot place the magnet’s strength will be weaker since there will be fewer magnet fields.
Hot temperature & Magnet: However it gets weaker if you put a magnet in a warm temperature. The strength of the magnet gets weaker from when the temperature goes up to 80°C. The strength gets weaker, because it decreases the magnet field. As the temperature rises, the additional heat provides more kinetic energy to allow some of the domains to randomly re-align, which subtracts from the overall strength of the magnet. As temperature rises further, then more and more domains become non-aligned and the magnetic strength decreases further. After more times there will be very less magnet field left.
So if you put a magnet in a cold place it will get strong because there will be more magnet field. But if you put it in a hot place the magnet’s strength will be weaker since there will be fewer magnet fields.