Tales of This Summer

Room with a View

I’m at MIT this summer! It’s awesome. I can see the Charles River out  my bedroom window. That’s awesome. I’m taking sailing lessons (triply awesome). But I have not written of my adventures yet!

I have a new phobia of pop-top cans. (not awesome.) It was Friday morning and we had just finished a grueling 20-hour journey from Georgia to Massachusetts. Although I only drove a couple of those hours, I was totally worn out. I grabbed a can of Campbell’s soup, pulled the tab…there was blood everywhere. I lost gallons of blood, but knowing I only had mere moments before I lost consciousness to blood-loss, I acted calmly. “Get me a paper towel” I told my younger sister as I washed my wound. “And get Mom, I’m about to faint.” “Joanna, just get a band-aide…” “Shut up! I’m going to faint!” Anywho, I spent the next three weeks feeling faint whenever I changed the band-aid…and the past couple of weeks showing it to anyone who will look. Look at this scar! I can regenerate! It’s awesome!”

I rode public transportation solo for the first time a week ago. I planned to attend a party thrown  by a friend who lives on the other side of Boston. It was out of biking range but I could take the bus and the subway. Unfortunately, I didn’t have a Charlie card, and while I could buy them at Star market, the website claimed the stores closed after 7. (Lies!) “No problem, I’ll just bike over to the subway station to buy a card” I looked for it for a while. After finding the station, I considered giving up the project, but I’d come so far! No, I was going to do this. Getting off the train, I noted that this wasn’t a very nice neighborhood, and I quickly set off in what I thought was the correct direction. “Hey, look! The street just changed names, and I haven’t found the cross-street.” I walked in the other direction. “Heh, heh, heh, now isn’t that funny, the street changed names again!” I then called my friend, who instructed me to walk to the *other* end of the street. After some maneuvering, I eventually found the house. By this time, the party was long since over. But I got ice-cream, and soothing photographs of water, and a summary of the pantheon of Middle-earth gods and genealogy. I also got a bed for the night. But I think I speak reasonably when I say that I am NEVER doing that again.

4th July in Boston

Living in Boston has been an experience. I have heard that Bostonians are rude. I’ll have none of that! Bostonians are kind and considerate…they’re just aggressive. (They invented America! Yah hear?!!) The people at MIT have been very kind and very good at explaining things from first principles. But the nice isn’t exclusive to MIT. The second time I rode the train solo, there were all sorts of tough-looking people on the train. One such person, who was sitting with his own group called over at me. “Hey! I like your shirt!” (Said shirt has “study” written across the chest and has earned me both positive and annoyed comments) “Uh, thanks?” “Yeah!” he said, “I think everyone should find something and just study it.” Yup. Just don’t talk trash about the Red Sox. Don’t do it. (Wearing Yankee’s apparel counts as talking trash.)

As for life in the lab, things have been fairly quiet. Professor Ross’s group, in which I am working, researches how to customize magnetic nano structures. Our research will eventually help to make really tiny memory and logic devices. This is important, because as computers continue to shrink, their components will soon be on the molecular-size level. A very simple example of a memory device in a computer is the electronic flip-flop which is used for counting. You know that computers operate in 0’s and 1’s (or on and off states). If we have a line of magnetic pillars and we turn the magnetic direction of one of the pillars from the “off” to the “on” direction, maybe we can make the next pillar to turn from off to on when the first pillar turns off again. Maybe we can make a third pillar turn from off to on when the second pillar turns off again, which would allow us to count in binary. (001 is 1, 010 is 2, 011 is 3, 100 is four, 101 is five, etc.)

MIT building 10

My project is to figure out how reclined octahedrons’ (diamond-shapes that are lying down so all you see is a triangular face) magnetic dipoles (Magnetic dipoles are like a tiny chunk of magnetism.) behave differently than the magnetic dipoles of standing octahedrons, and how the properties of different materials change the behavior of the magnetic dipoles. In particular, we have been studying what happens to the magnetism when the pillars get squeezed. To do this, we grow the crystals surrounded by a piezoelectric (which expands when current is run through it, and squeezes the pillars) Another thing I, personally, hope to discover is why the octahedrons sometimes lie down and sometimes stand up.

First, I have been modelling these things, I am writing input for an object-oriented micromagnetic framework software and it models the magnetic dipoles. (Translation: I write something that looks like code, and the computer draws me a picture of which way the north and south poles of a magnet are pointing.) So far, I have only drawn a single octahedron. There has been lots of geometry involved. Who knew you could mess up basic geometry so many times? Secondly, I’ve been testing samples of standing octahedrons because the reclined ones do not seem to be growing under the conditions the group thought would work. (For the curious, we have been using a silicon substrate covered with a layer of yttrium doped zirconia, which is covered with a layer of CeO2 which is finally topped with BiFeO3 which acts as piezoelectric and surrounds the pillars which are made of either CoFe2O4, Fe3O4, MgFe2O4, or NiFe2O4.) I’ve been using a vibrating sample magnetometer and a Hi-Res X-Ray Diffractometer.

Currently, I am looking for literature values of saturation magnetization, anisotropy, and exchange energy which I need for computer models. I am also scheming on how to best make an array of these things. (As I use it, an array is a group of objects arranged in rows and columns). I also need to learn how to properly translate the data from the VSM and HRXRD. Yay.

After all that lab work, I visited the Hyannis beach this Saturday. The sea is really salty. I though that perhaps it was a pleasantly salty, but it’s rather disgusting. It really burns when it gets into the eyes. Despite all this, waves are crazy awesome. I love waves. Waves are like wind, only waves can actually bodily move me. I’d take a day at the sea over SixFlags any day. However, I should probably mention that I have not swam at the beach for about fifteen years. I should also mention that I when I went to SixFlags a couple of years ago, I discovered that I don’t like most rollercoasters. The beach is still really awesome.  Kalmus BeachShell Art

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