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I think that LK-99 is a misidentification.
The current situation seems to be that room-temperature superconductivity LK-99 is not true. At least, no experimental results have been obtained to confirm that LK-99 is a superconductor.
Here I will judge only by the video and logic. Then, even from what we have already found, we can conclude that this is a misidentification.
I will give the details below.
Not a diamagnetic supercondutor
In a previous article, I mentioned diamagnetism.
→ Room Temperature Superconductors LK-99: Open Blog(Japanese only)
In this article, I introduced the view that "it is diamagnetic but not superconducting" (+,-) and then rejected it. From that conclusion, the following two possibilities remain.
* This is both diamagnetic and superconducting. (+,+)
* This is neither diamagnetic nor superconducting. (-,-)
It remained impossible to say which of the two it is.
It is not diamagnetic.
In this section, we newly conclude that this is not diamagnetic.
The main reason is that the behavior is clearly different from that of diamagnetism. However, it would be tedious to explain this, so I will omit the explanation here.
What is more important is the following.
It is a magnetic object.
More importantly, we can determine that this object is magnetic. The reasons are as follows.
(1) Requirements
There is a video of this object.
In this latter part, we can see that the object is vibrating.
Here, "vibrating" means that there is an energetic stability point there. (If it deviates from the stability point, it tries to get back to where it was.)
In that case, some force is acting on this object.
Such a force can only be magnetic force here. (This is because of the magnetic field of the magnet.)
Since magnetic force is the only force at work here, it follows that this object cannot be anything other than magnetic. In other words, "being magnetic" is a necessary condition.
If the object were diamagnetic, it would not vibrate. Since there is no force acting on it, it simply flows in a certain direction according to the law of inertia. The fact that it vibrates itself means that there is a force working on it.
Here, "vibrating" means that there is an energetic stability point there. (If it deviates from the stability point, it tries to get back to where it was.)
In that case, some force is acting on this object.
Such a force can only be magnetic force here. (This is because of the magnetic field of the magnet.)
Since magnetic force is the only force at work here, it follows that this object cannot be anything other than magnetic. In other words, being magnetic is a necessary condition.
# If the object were diamagnetic, it would not vibrate. Since there is no force acting on it, it simply flows in a certain direction according to the law of inertia. The fact that it vibrates itself means that there is a force working on it.
(2) Sufficient condition
Assuming that being magnetic is a necessary condition, what about a sufficient condition? Assuming this is a magnetic body, can we explain the vibration?
Yes, we can.
Suppose there is an N-pole under the floor. The magnetic body has an S-pole and an N-pole. The S-pole of the magnetic body is attracted to the N-pole under the floor, and the N-pole of the magnetic body repels the N-pole under the floor. This causes the magnetic body to stand upright. However, the lowest part of the magnetic body is in contact with the floor.
Since this state is stable, it remains stationary.
If some force acts on it and shakes it, it tries to return to its original stable state. This causes the object to vibrate.
Thus, the vibration can be explained by saying, "This object is magnetic". In other words, the sufficient condition is satisfied.
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By (1) and (2), the necessary and sufficient condition is satisfied by saying "this object is magnetic". Hence, we can say, "This object is a magnetic body.
An object that is magnetic is not a superconductor. Therefore, LK-99 is not a superconductor.
End of argument.
* I have logically deduced it, and it is close to the reasoning of a great detective.
* It cannot be said that it has been experimentally proven.
There is a magnet under the floor.
Under its magnetic force, the magnetic body tries to stand upright. (Rotate right)
The attached gray part of the magnetic body tries to move down due to its weight. (Rotate left)
In a situation where both forces are balanced, the gray part appears to float.
