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May-16. Today is the birthday of Johannes George Bednors, who received the Nobel Prize in Physics for the discovery of high-temperature superconductivity.





Today (May 16, 1950) is the birthday of Johannes George Bednors, who received the Nobel Prize in Physics for the discovery of high-temperature superconductivity.

Johannes George Bednors was born on May 16, 1950, to the youngest of four children, elementary school teacher pianist and teacher Elizabeth Bednors in Neuenkirchen, North Rhine-Westphalia, Germany. Both of his parents were from Central Europe and Cilicia. But in the turmoil of World War II, he was forced to move west. As a child, his parents tried to get him interested in classical music. But he practiced. He was more interested in working on motorcycles and cars. In high school he developed an interest in natural science. He focused on chemistry through experiments.
In 1968, Bednors enrolled at the University of Munster to study chemistry. At the interface of chemistry and physics, he wanted to switch to the lesser-known subject of crystallography, a branch of mineralogy. In 1972, his teachers, Wolfgang Hoffman and Horst Palm, spent the summer as a visiting student at the IBM Zurich Research Laboratory. The experience here will further shape his life: his late collaborator Kay, who heads the physics department. Not only did he meet Alex Mueller, but he also enjoyed the atmosphere of creativity and independence cultivated in the IBM Lab.

In 1974, he went to Zurich for six months to test part of his diploma. Here he developed the crystals of SrTiO3, a ceramic material belonging to the family of perovskites. Mueller, interested in berovskites, persuaded him to continue his research. After graduating from Munster in 1977, Bednors received a doctorate in ETH Zurichl (Swiss Federal Institute of Technology), under the supervision of Heiney Granicher and Alex Mueller.
In 1982, after receiving his doctorate, he joined the IBM Lab. There, he joined Mueller's research on superconductivity. In 1983, Bednors and Mர்ller began a systematic study of the electrical properties of ceramics derived from transition metal oxides. Also in 1986 they succeeded in triggering a lanthanum barium copper oxide superconductivity. The critical temperature of the oxide is 35K. That’s a full 12K more than the previous record. This discovery prompted further research on the high temperature superconductivity of cabaret materials with structures such as LBCO. It soon led to the discovery of compounds such as BSCCO (107K) and YBCCO (92K).
In 1987, Bednors and Muller were jointly awarded the Nobel Prize in Physics for their significant contribution to the discovery of superconductivity in ceramic materials. That same year, Bednors was appointed an IBM Fellow.

Information: Ramesh, Assistant Professor of Physics, Nehru Memorial College, Puthanampatti, Trichy.

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