Meissner Effect

A permanent magnet begins to hover above a ceramic material as it cools and transitions to a superconducting state; the magnet remains aloft until the ceramic warms above a critical temperature.
The ceramic material is a 25mm disc of yttrium barium copper oxide (YBa2Cu3O7, also commonly referred to as "YBCO”). The YBCO has a critical temperature of 90K and is cooled with liquid nitrogen, which boils at 77K. The magnet is just under 5mm per side and weighs about 0.8 grams.
The magnet is able to levitate due to its interaction with persistent electric currents that expel external magnetic field from the interior of the superconducting YBCO. (The details of this interaction are complicated, and cannot be fully explained using classical physics.)
For more details on our setup and references for further study, see sciencedemonstrations.fas.harv...
Also check out this video from the Annenberg Foundation on high-temperature superconductor research www.learner.org/courses/physic...

[@austien726]

This is the most wonderful thing i've ever seen.

[@GTASUITES]

Same here bro. Avatar unubtanium stuff going on right here 🤣🤣🤣

[@bobsmith3291]

You don’t get out much

[@AbhiramAbbireddy]

"Incredible video on the Meissner effect! The clarity of your explanation and the visual aids used really helped me understand this phenomenon better. Well done!"

[@2000anandhu]

*magnet.exe has stopped working*

[@robh467]

*won't stop working.

[@kingshukkumardas3514]

...That ceramic orthorhombic type -II Super-conductor was awesome....The strength of the magnet can be easily assumed to be small as it was elevated to a little distance....

[@dylanparker130]

i don't understand this but that lack of understanding makes this even more wonderful!

[@salabs4222]

DIY KZbin

[@salabs4222]

And DIY pair of magnets in the fingers

[@mith_jain_here]

At low temperatures, certain materials turn into superconductors, which provide zero resistance to electric current and totally repel magnetic field (perfect diamagnetism). Hence the magnet is being repelled and so floating in air

[@dylanparker130]

@@mith_jain_here That's fascinating - thank you!

[@CydiaMasterHack]

Love it mate

[@wuyisince927]

i am here for LK99. Thanks for this video

[@dennisdistant]

You're a star Allen

[@wu200883]

super cool stuff

[@RadFinder]

It is work like cloud chamber? I see traces in clouds.

[@indiaview9414]

First time saw Meissner effect experimentally...

[@tomkamikaze]

Here because of LK-99 Fingers crossed

[@dvorakgigachad1444]

fingers crossed so hard my tendonds ripped

[@adamfanning9412]

It was bull

[@captnjaygreybeard6394]

if it was in a total vacuum with no air resistance, and constant replenishing of liquid nitrogen, I wonder how long it would spin ?

[@salabs4222]

With six of them facing each other positive negative positive negative

[@salabs4222]

I wonder how long they would stay spinning

[@Juke172]

liquid nitrogen would freeze to solid in vacuum.

[@europebasedvlogs1251]

@@Juke172 ye

[@eshanaiyashankar]

it was told to me that it is not possible to maintain total vaccume

[@TiagoTiagoT]

How come the magnet can rotate? Why aren't the parts outside the center also getting pinned in place?

[@mama3416]

عظمة بكيت من الدهشة

[@av733]

Can I buy some Yttrium barium copper oxide? I want to try this at home, is it expensive or poisonous?

[@tompolk7588]

Are the "streaks" (@ 2:05) in the saturated layer just above the experiment, tiny droplets on ionized air? Like a cloud chamber? If so, wow!

[@Metal_Master_YT]

I thought that as well, but if there were that many long lines, then he must be near a large radioactive source...

[@ericBorja520]

how much weight can it hold while still floating?

[@zetamob]

amazing

[@DungeonMetal]

Fabulous

[@elliotfreudenberg]

wow that was completely different!

[@SBO-worker]

What other components have same liquid nitrogen

[@bybeyzay]

wow. just wow.

[@Agakir]

I saw (Meissner effect) in my childhood during physics shows, we can mimic the same levitation by using rotating magnet without low temperature (low temperature increase magnetism).

[@petermueller7407]

yeah but the difference is, it needs to be a rotating magnet and it will stay on exactly one position. But here you can move it around and it will stay where u leave it.

[@Agakir]

cdn.shopify.com/s/files/1/1339/1507/products/IMG_7846_FIN_S.jpg

[@Dhirajkumar-ls1ws]

LK99 FTW

[@drakekay6577]

Did that magnet just spin on a single axis? Can you describe the materials to me once more? The ceramic object, what is the darker circular object just below the magnet?

[@drakekay6577]

en.wikipedia.org/wiki/Yttrium_barium_copper_oxide

[@scamenzo]

Super conductor

[@ambrose1809]

Why does "ice" only form on four of its six sides?

[@zack_120]

There are so many streaks flying over indicating there are many ions of some sort above the chilled space.

[@adamfanning9412]

Pretty sure that was to show the magnetic field

[@ushajaiswalushajaiswal5109]

Its damn good

[@techindia3602]

Who is here after LK-99 ?

[@nanow1990]

😁

[@gauravprusty2508]

0:50 the magnet started meditating and had such strong aura that it pushed everything around it, basically became goku powering up, and then slowly everything calmed down as it learned to fly................................LMAO. beautiful video though

[@NickMoore]

Always an interesting demo but what causes the "threads" of condensation above the liquid nitrogen? They look similar the trails you see in a cloud chamber so i assume something must be at the tip of each trail (dust, water droplets, something else?).

[@NatSciDemos]

Nick Moore Good question. I'm not sure exactly what is causing the condensation trails, but I do know that it was very humid that day and the air conditioning in the lecture hall was turned off.

[@NickMoore]

Harvard Natural Sciences Lecture Demonstrations I'm going to have to get my hands on some liquid nitrogen and find out for myself!

[@sakthivelanr]

+Nick Moore I was about the ask the same question. It looks strikingly similar to a cloud chamber. If you also notice the rate of formation of a trial is not so high.

[@NickMoore]

+Sakthi Velan That's what they remind me of too. If airborne dust or suspended water droplets could stimulate the condensation.

[@drakekay6577]

Open access to the atmosphere(origin of condensation). Notice how those streams move along the electromagnetic path, perpendicular to the axis of the magnet? At 1:53 those streams have a moment of internal(to the two magnetic fields) cohesion, or balance. Then the hand and forceps move in and push air through the area changing the flow inside the micro-climate.

[@that1guy899]

Unfortunately, I'm not informed well enough to truly understand what's happening here but it sure looks awesome! 👍

[@jayjoy]

Basically that ring type material becomes diamagnetic and repulses a magnetic cube when kept below a certain temperature which is known as critical temperature and shows superconductivity

[@rafakordaczek3275]

LK-99 brought my ass here

[@MostlyPennyCat]

Have you seen the first video of Lucky-99 doing this? Well not this, apparently, but 'flux-pinned'

[@George-wk5yd]

But why does it happen?

[@bashayerkhalid6179]

It's like magic

[@mdredheadguy1979]

Just imagine if we could find a way to power trains or cars with something like this!!

[@yksbitirici3565]

They do actually. maglev trains

[@mdredheadguy1979]

@@yksbitirici3565 well, that uses electricity and electromagnets. This uses a chemical reaction and a magnet. I'm not sure if it's the same thing... I could be wrong, it would be the first time.

[@yksbitirici3565]

@@mdredheadguy1979 i’ve learned something new today thanks for that they are not actually the same thing but it’s too similar as logic

[@yksbitirici3565]

@@mdredheadguy1979 I don’t have that much info about this topic sorry

[@mdredheadguy1979]

@@yksbitirici3565 Hey, no worries. Luke I said, I could be wrong too.

[@cuti9114]

Is it some kind of ritual

[@soumyadeepbag202]

Just Wow 🔥

[@petermueller7407]

You can position the levitating object everywhere you like in a defined area?

[@NatSciDemos]

The small magnet is stable within a few millimeters of the center of the YBCO disk.

[@petermueller7407]

@@NatSciDemos Isn't this remarkable. What the heck is going on. "Normal" magnetic stuff does not behave like this.

[@adamfanning9412]

​@@petermueller7407 What's going on is in the title of the video, the meissner effect. Its pretty complicated but it's caused by the superconducter creating an exact opposite magnetic field to that of the magnet. Thus repelling it and making it float.

[@funkycatglasses01]

Whooooa 😮😵‍💫

[@ValerioPattaro]

hi, I'm an Italian physics teacher and I'd like to ask you a favor. I have a youtube channel of mathematics and physics in Italian. I do not have a laboratory as equipped as yours and therefore I would like to ask your permission to publish some parts of your experiments in order to comment on them in Italian. Of course I would always mention the source and insert your links. Waiting for your kind reply, I send you my greetings, Valerio Pattaro

[@BestYouTubeVids123]

Pour over kix cereal or those long corn pops and you make dragons breath when you eat them... 😆👍

[@salabs4222]

Okay now what would happen if you had six magnets facing each other three on one side and 3 on the other side positive negative positive negative or 3 in a circle positive negative positive negative doing that same experiment would they stay spin

[@chaudhary90116]

Arts and commerce students like jaadu 😄😜 But science students know it that oh Meissner effect 😄😜

[@harisaisenthilkumar2880]

Hail Superconductivity

[@lakshaymehta9399]

Bonus particle detector 🌝

[@nameismetatoo4591]

Could be caused by dust in the air too. Anything that creates a nucleation site for the nitrogen to condense.

[@fallinginthed33p]

Now we can skip the LN2 part... A room temperature superconductor would change the world.

[@safak3228]

hayatı gözlerinin önünden geçiyor

[@ratneshpaliya52]

Waiting for MagLev trains and buses, it will connect the world like never before. You will think of reaching Mumbai from Europe by Train😁😁

[@robh467]

In the last ten months dozens of more elements have been discovered to enable Superconductivity, as well as laser editing of waves and frequency in circuit.

[@robh467]

Think of endless power in the palm of your hand. What would you do with it? Wouldn't need a train.

[@prasadramasamy904]

anyone in 2021??????????????????????????

[@mdredheadguy1979]

Yep, people still exist, although I suspect not for long.

[@prasadramasamy904]

@@mdredheadguy1979 hahahaha

[@anyclipwithmrraven1030]

Fuckin amazing

[@NoBody-ev4rn]

Came here after reading PHYSICS OF THE IMPOSSIBLE by MICHIO KAKU

[@RepublikAnime]

Aldnoah Zero

[@zuperdude7701]

whos here from the python devlog shitpost

[@peterluxus7382]

put a frog inside

[@advaitmenon2667]

Anyone here from the Python official website? :p

[@Makoed76]

Аааа шайтанама

[@Traptrickerplays]

python lol

[@clrkgmii]

w a t

[@MattDMo]

Who else came here from the Python 3.10.1 release page?

[@wh1test0rm3]

OMG WTF this is what can im say

[@arcissea]

who from python?