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Why Magnetite is Magnetic

Why Question

Maia Warner

on 16 October 2012

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Transcript of Why Magnetite is Magnetic

By, Maia Warner Why is Magnetite Magnetic? Why is Magnetite Magnetic? There's the idea that there was a Shepard boy named Magnes who discovered Magnetite in Macedonia when he was pasturing his flock of sheep on mount Ida, and the Magnetite clung to the metal nails in his shoes and the metal end of his crook. Who Discovered Magnetite first? However, that's just an idea, some other people think that it was discovered by the Greeks in
Turkey. And yet other theories say it was first discovered in China. But no one really knows This is also debated. Some say it was Thales in
Greece in 600 B.C. Some say it was the Chinese,
and some say it was a Swedish Scientist who
first noted the difference between
unmagnetized iron and magnetized iron. Who Researched it First? Some other people who have made large
impacts on our knowledge of magnetism
Hans Christian Oersted
Michael Faraday
James Clerk Maxwell
and many others. Some Others . . . Without magnetism we wouldn't understand a lot of things such as animal migration(as migrating animals have a sense of the Earth's Magnetic Field), or even something as simple as navigation. We don't really realize how often we use magnetism. We even use Magnets for electricity. Effect on Geology We use magnetite and magnetism much more than we realize. We use it for MRI's, in trains, in junkyards, headphones, computers, credit cards, roller coasters, CD players, elevators, and many more things that we use on a day to day basis. Magnetism in our Daily Lives Magnetite is Magnetic because of the flow of the negatively charged electrons flowing between two types of iron that have different charges. This flow within the Magnetite generates a magnetic field. Magnetite 1st step (cc) image by nuonsolarteam on Flickr Another Reason Magnetite is Magnetic is because of the spinning of the unpaired electrons and how they are aligned. The more unpaired electrons there are, the more magnetic the mineral is. Thus, when put under pressure, there is a decrease in unpaired electrons, making the mineral less magnetic. William Gilbert Magnetite is magnetic because the domains in the magnet face the north and south poles of Earth's Magnetic field. The world has known about Magnetism for thousands of years, but William Gilbert was the first to actually work with them. He preformed elaborate experiments on the magnets, using a lodestone and a free-moving needle. Using this, he discovered the Earth's magnetism, that is moved in a circular fashion and how to make regular metals into magnets. Not all Magnetite is Naturally Magnetic. Only a certain kind of it is. This is called Lodestone. Lodestone's domains are naturally aligned with Earth's magnetic field. But all other ferromagnetic objects' domain's are not. (A Ferromagnetic object is something that can easily be magnetized, but most likely will not retain the magnetism for long.)When the domains in a magnet line up, it means that the object has either: A) Been magnetized, or B) Is naturally Magnetic(like Lodestone). Some of what we've found out so far. Although we've known about Magnetite and it's properties for thousands of years, recently, there has been a new discovery about magnetite and temperature. This experiment was led by the European Synchrotron Radiation Facility in France. In the "X-Ray Experiment" Scientists point an intense X-ray beam at a tiny Magnetite crystal at low temperatures. This is helping Scientists understand to a further extent the structure of the Magnetite Atoms and how it behaves. What they found out is that once Magnetite reaches a certain temperature, it can no longer transport an electrical current. This new found knowledge will help them develop future technologies. Still Discovering . . . It's hard to say exactly how Scientists discovered why magnetite is Magnetic, because Scientists are still researching it. We do not yet fully understand Magnetite. The X-Ray Experiment
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