English name: Manganese Boride
Subformula: MnB
Subquantity: 65.75

The discovery was made by a team led by Qiu Guangchun, a professor at aoyama 

Gakuin University's Department of Science and Technology. The superconducting 

material has a superconducting transfer temperature as high as Tc = 39K(-234℃) 

when the resistance drops to zero. The discovery rewrites the record for non-copper 

oxide superconducting material Tc. Mr Akiko held a press conference on 26 February 

2001 to announce the results of the study. A number of research institutions in Japan 

and abroad "also confirmed" this fact through additional tests (International Center 

for Superconducting Industrial Technology Institute of Superconductivity second 

Research Director, Suko Tajima et al.). The higher the superconducting transfer 

temperature, the more convenient it is to use. The Tc of 39K is not particularly high. 

At present, humans have found a high-temperature superconductor (HgBa2Ca2Cu3O8)

with Tc of 134K(-139℃). The discovery of a new superconductor has attracted attention 

because of its composition. In the past, superconducting temperatures were mostly 

achieved by copper oxides. Because copper oxide belongs to the ceramic class, 

it is "difficult to be processed into a linear shape, so it has not been used until now" 

(Qiu Guang). Compared with this, the metal compound manganese diboride has 

the following advantages.

(1) Manganese (Mg) and boron (B) are cheap and readily available. "This is the 

best combination for industrialisation" (Autumn).
(2) As the synthesis temperature is only 700℃, so the manufacturing and processing 

cost is low.
(3) The superconducting properties of the alloy containing Mg metal elements and

manganese diboride will not be impaired even if it is processed into the alloy state.
(4) As it is only composed of two elements, it is easy to synthesize into thin films. 

The material is closest to the SQUID(superconducting quantum interference device) 

requirement.