World Exhibition in Rennes. "Magnetism is at the heart of the energy transition"

14:20  27 september  2022
14:20  27 september  2022 Source:   ouest-france.fr

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Hélène Fischer a mis au point les manipulations de l’exposition « Magnétique ». © Ouest-France Hélène Fischer has developed the manipulations of the "magnetic" exposure.

Magnetic exposure to the Sciences Space explores the properties of magnetism starting from daily applications. Present in electric motors, computers, magnetism is for researcher Hélène Fischer at the heart of the energy transition.

Interview with Hélène Fischer, teacher-researcher in electromagnetism at the Jean Lamour Institute in Nancy who designed the magnetic exhibition at the Sciences Space of Rennes.

You are a researcher in electromagnetism, why did you want to get out of your laboratory to develop magnetic exposure?

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Magnetism, this distance force, is a subject of fantasy. Magnetism is omnipresent in our daily life and it is barely taught! However, it is found as well in induction heated plates as in the engine of an electric bike. I am passionate about basic research, but I now want our discoveries to be shared, that they have a meaning for the public. So that it simply believes us!

Do you go ahead to explain magnetism without a single equation?

The objective is to start from the fridge magnet to achieve at the French Nobel Prize Albert Fert on magnetoresistance (capital to understand the functioning of the reading of the hard drives), without going through math. Exhibition has around fifty manipulations that make it possible to understand magnetism. What is a magnet? Why are the materials magnetic? What is it for in our phone charges for example? And why magnetism is at the heart of computers. The space of science has implemented them, so that the exhibition is accessible from 8 years old.

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Les médiateurs animent l’exposition « Magnétique » avec des démonstrations de propriétés des aimants. © Ouest-France The mediators animate the "magnetic" exhibition with demonstrations of loving properties.

You say that magnetism is at the heart of the energy transition, why?

Electric motors work thanks to strong magnets, made using rare land which are extracted only in China under deplorable human conditions and pollution. So you have to find other solutions to make strong magnets, this is a first field of research. In addition, magnetism is present in the components of the hard drives which are very energy -consuming. Data storage is expected to reach 30 % of global electricity consumption in 2030. You have to find solutions to store more data by consuming less. This is the second field of research called spintronic.

Magnetic exhibition at the Espace des Sciences des Champs Libres, in Rennes, until March 5, 2023, Tuesday to Sunday. Full price € 6, reduced € 4. Entertainment on magnetism on Wednesdays, Saturdays and Sundays. Conference "La Spintronique to store more, faster and more sober", Tuesday October 11 in the Hubert-Curien auditorium with Hélène Fischer.

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