Chapter 232: This research result... is actually fake?
After preparing the suspected superconducting materials and magnets, the experiment officially began.
Ning Chen placed this modified lead apatite crystal structure on top of the permanent magnet and adjusted the two to a suitable distance.
At this time, there was no experimental phenomenon similar to the Meissner effect.
Such a result was expected by Ning Chen. After confirming that it did not cause any experimental phenomena, Ning Chen said:
"Let's start cooling down now. It is expected that some obvious experimental changes will occur around 110K."
Xu Zhou and others were also a little surprised when they heard Ning Chen's words.
Xu Zhou did not expect that Ning Chen had calculated the specific temperature in advance.
But since Ning Chen didn’t think this was a superconductor, why did he predict a special transition temperature?
However, because everyone is now focusing on the experiment, Xu Zhou tried his best to suppress the doubts in his heart and just followed Ning Chen's request to conduct the experiment with everyone.
Next, Ning Chen and others lowered the temperature of this modified lead apatite crystal structure material.
When the temperature of the material dropped to close to 110K, Ning Chen slowed down the temperature reduction and carefully observed the changes in the experimental phenomena.
Just when the material temperature dropped below 110K, a magical phenomenon suddenly occurred.
I saw this modified lead apatite crystal structure material suddenly suspended in the magnetic field.
Seeing this phenomenon suddenly appear, everyone felt very incredible.
"Surprisingly...this situation really occurs at around 110K. Teacher Ning, is this material really a superconductor?"
Hearing Xu Zhou's words, Ning Chen shook his head and said :
“We can’t say that yet. Although the Meiners effect is a property of superconductors, substances with the Meiners effect are not necessarily superconductors. The next complete conductivity experiment will This question can be verified more accurately."
"In other words, the Meiners effect is only a necessary condition for matter to become a superconductor?"
"Yes, it does exist. Some counterexamples.”
While talking, Ning Chen was already preparing for the next experiment.
Ning Chen was already very familiar with measuring the complete conductivity of a substance, so he simply stopped doing it himself and let the commander-in-chief do it directly.
After many times of training by Ning Chen, the former commander was also very qualified in the various operations of the superconducting experiment. Ning Chen was completely relieved to leave these tasks to the former commander, while he observed from the sidelines. Experimental phenomenon.
"Teacher Ning, do you need to slow down the temperature drop within a certain temperature range this time?"
"No need, just lower the temperature to an absolute level at a certain speed. Just around zero. If there is any sudden change, I can notice it.”
In fact, the experimental phenomena observed by everyone before have confirmed Ning Chen's predictions about this substance.
Ning Chen knew that this substance was not a superconducting material, so he was confident that he did not have to deliberately slow down the temperature drop.
If any unexpected phenomenon suddenly occurs during this process, just conduct the experiment again.
In this way, Yuan Shuai continued to control the cooling of the test material until the temperature was very close to absolute zero, but there was still no suspicion of complete conductivity.
"Okay, Commander, this experiment can be ended."
After carefully observing all phenomena during the entire experiment, Ning Chen issued the order to end the experiment.
Because absolute zero cannot be reached, when the test environment temperature is already very close to absolute zero, it does not make much sense to spend time lowering the temperature.
Hearing Ning Chen’s order, the former commander also stopped the experiment in his hands and started recording the experiment.
During the experiment just now, no meaningful experimental data appeared, but the commander-in-chief still completed the experiment report as required.
At this time, Xuzhou finally couldn't help but ask:
"Teacher Ning, since this material is not a superconductor, but it has the properties of the Meiners effect... then what kind of material is this material?"
Scientific Research in Xuzhou In my life, I have never seen such a special material.
Sui Feng, Yuan Shuai and others also had similar thoughts and were looking forward to Ning Chen's answer.
Under the gaze of others, Ning Chen explained patiently:
"To be precise, this is a very special magnetic material. The Meiners effect is only a special effect of superconductors. A characteristic behavior, but not all materials with the Meiners effect are superconductors. Some special magnetic materials will also exhibit the Meiners effect under the right conditions..."
In order to make his words more convincing, Ning Chen also found several documents to prove his point of view.
After seeing the papers found by Ning Chen, Xu Zhou and others no longer had any doubts. But Xu Zhou was a little surprised. Since when did Ning Chen think of such a possibility.
"Teacher Ning, have you... read all the relevant literature?"
"That's not true, I just checked the relevant documents. It’s just part of the paper,” Ning Chen said.
In fact, Ning Chen directly entrusted Xiaozhi to search for these papers. It would not be easy for Ning Chen to find these papers one by one.
But Xiaozhi has his own set of search logic. As long as Ning Chen expresses his needs, Xiaozhi can quickly and accurately find relevant documents and arrange them according to priority from high to low. It saved Ning Chen a lot of trouble.
After completing all the measurement experiments, Ning Chen and others quickly compiled the results into a paper.
Because this research is just an experimental replication of the South Korea scientific research team, Ning Chen does not intend to submit this paper to an academic journal. At the same time, Ning Chen also hopes that this paper Papers can be published publicly faster.
Therefore, arXiv has become the best publishing platform for this paper.
After submitting the paper to arXiv, Ning Chen no longer paid attention to this matter, but analyzed the results of this experimental replication.
Although the material synthesized by South Korea this time is not a real superconductor, this magnetic material undoubtedly has certain research value.
Ning Chen thought about the material mechanism of this substance and quickly found the key point.
"Copper...is the addition of copper!"
Because the normal lead apatite crystal structure does not have such properties. But adding a small amount of copper plays a key role in changing its properties.
Research on copper-based superconductors has always been a hot research category among superconductors. Even the existing superconductors with the highest superconducting critical temperature are also copper-based superconductor materials.
Ning Chen quickly constructed microstate models of various substances in his mind. After some simulations and calculations, Ning Chen found several possible directions to try.
“When we go back and let Xiaozhi conduct modeling based on these ideas, we should be able to start subsequent experiments.”
In the evening, Ning Chen came to the study and asked Xiaozhi Zhi explained these thoughts of his.
In fact, if Ning Chen can use brain simulation skills to simulate, he can have a more powerful model effect than Xiao Zhi.
But after all, Ning Chen only has one simulation left. If there is no particularly strong demand, Ning Chen will not easily use this precious last simulation opportunity.
As for Xiaozhi's model processing function, there is no limit on the number of times it can be used, and it only needs to consume some power.
After Xiaozhi successfully read Ning Chen’s thoughts, Xiaozhi immediately began the work of modeling.
The advantage of Xiaozhi is that the modeling process is very fast, the models he makes are also very clear, and he can predict various properties that these substances may have.
Although these predictions are not necessarily very accurate, they are enough to provide Ning Chen with a lot of valuable ideas.
While Ning Chen was looking at the various models constructed by Xiaozhi, he was deriving various formulas, performing complex calculations, and constantly optimizing Xiaozhi's models.
Generally speaking, there are no big problems with the model constructed by Xiaozhi, and it has a very sufficient theoretical basis. However, Ning Chen will not completely follow Xiaozhi’s opinions, because in some places, Ning Chen believed in his own ideas even more.
After a night of analysis, Ning Chen finally determined the next research direction.
“By conducting research along these lines, it should be very promising to create a new superconducting critical temperature record for superconductors.” Ning Chenxin said.
Ning Chen secretly decided in his heart that when he comes to the laboratory tomorrow, he will start to conduct new experiments to attack the new record of high-temperature superconductivity.
...
This paper published by Ning Chen on arXiv did not attract the attention of others at first.
Because there are so many papers published on arXiv every day, if it is not a paper of particularly outstanding quality or a particularly gimmick, it is indeed difficult to attract very high attention.
However, as time passed little by little, people gradually began to pay attention to Ning Chen’s paper.
After all, South Korea’s paper on room temperature superconductors is very eye-catching, and Ning Chen’s reproduction results are the first laboratory in the world to publicly state that they have completed the reproduction of this experiment. .
What's more, Ning Chen's research in the field of superconductivity is very eye-catching. Several research papers on superconductivity have been published in the main journal of "Nature".
When they saw the content of Ning Chen’s paper, it aroused heated discussion among them.
"This research result of South Korea... is actually fake?"
Compared to the experimental team of South Korea, everyone obviously trusts Ning Chen more.
(End of this chapter)