Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

New technology in the magnetic cooling of chips

20.02.2013
Luis Hueso, the CICnanoGUNE researcher, together with researchers from the University of Cambridge, among others, has developed a new technology in the magnetic cooling of chips based on the straining of materials. Compared with the current technologies, this advance enables the impact on the environment to be lessened. The work has been published recently in the prestigious journal Nature Materials.
Current cooling systems, be they refrigerators, freezers or air conditioning units, make use of the compression and expansion of a gas. When the gas is compressed, it changes into a liquid state and when it expands it evaporates once again. To evaporate, it needs heat, which it extracts from the medium it touches and that way cools it down. However, this system is harmful for the environment and, what is more, the compressors used are not particularly effective.

One of the main alternatives that is currently being explored is magnetic cooling. It consists of using a magnetic material instead of a gas, and magnetizing and demagnetizing cycles instead of compression-expansion cycles. Magnetic cooling is a technique based on the magnetocaloric effect, in other words, it is based on the properties displayed by certain materials to modify their temperature when a magnetic field is applied to them. However, the applying of a magnetic field leads to many problems in current miniaturized technological devices (electronic chips, computer memories, etc.), since the magnetic field can interact negatively owing to its effect on nearby units. In this respect, the quest for new ways of controlling the magnetization is crucial.

Magnetism without magnetic fields

The researchers Luis Hueso, Andreas Berger and Odrej Hovorka of nanoGUNE have discovered that by using the straining of materials, they can get around the problems of applying a magnetic field. “By straining the material and then relaxing it an effect similar to that of a magnetic field is created, thus inducing the magnetocaloric effect responsible for cooling,” explains Luis Hueso, leader of the nanodevices group at nanoGUNE and researcher in this study.

“This new technology enables us to have a more local and more controlled cooling method, without interfering with the other units in the device, and in line with the trend in the miniaturization of technological devices,” adds Hueso.

20-nanometre films consisting of lanthanum, calcium, manganese and oxygen (La0.7Ca0.3MnO3) have been developed. According to Hueso, “the aim of this field of research is to find materials that are efficient, economical and environmentally friendly.”

“The idea came about at Cambridge University and among various groups in the United Kingdom, France, Ukraine and the Basque Country we have come up with the right material and an effective technique for cooling electronic chips, computer memories and all these types of applications in microelectronics. Technologically, there would not be any obstacle to using them in fridges, freezers, etc. but economically it is not worthwhile because of the size,” stresses Hueso.

Today, most of the money spent on the huge dataservers goes on cooling. That is why this new technology could be effective in applications of this kind. Likewise, one of the great limitations that computer processors have today is that they cannot operate as fast as one would like because they can easily overheat. “If we could cool them down properly, they would be more effective and could work faster,” adds Hueso.

Dr Hueso stresses that this is a very interesting subject with respect to future patents.

Luis Hueso

Luis Hueso (Madrid, 1974) is an Ikerbasque researcher and leads the nanodevices team at nanoGUNE. He has a PhD in Physics from the University of Santiago de Compostela. Between 2002 and 2005 he was a Marie Curie fellow at Cambridge University where he developed a project on spin transport in carbon nanotubes. In 2006 he moved to the Consiglio Nazionale delle Ricerche (Italy) and in 2007 was appointed Professor at the University of Leeds. Since 2008, Luis Hueso has been pursuing his scientific research activities in the nanodevices team at nanoGUNE. He has been exploring materials and functionalities to be able to develop new electronic devices that constitute a revolution with respect to the current silicon-based ones, which could soon be reaching the limits of their capacity. It was in fact this work that in 2012 earned him the prestigious Starting Grant awarded by the European Research Council to the tune of 1.3 million euros.

Publication reference

X.Moya, L.E. Hueso, F. Maccherozzi, A.I. Tovstolytkin, D.I. Podyalovskii, C. Ducati, L.C. Phillips, M. Ghidini, O. Hovorka, A. Berger, M.E. Vickers, E. Defay, S.S. Dhesi and N. D. Mathur. Giant and reversible extrinsic magnetocaloric effects in La0.7Ca0.3MnO3 films due to strain. Nature Materials. DOI: 10.1038/NMAT3463.

Irati Kortabitarte | EurekAlert!
Further information:
http://www.elhuyar.com

More articles from Materials Sciences:

nachricht Beyond conventional solution-process for 2-D heterostructure
22.06.2018 | Science China Press

nachricht Graphene assembled film shows higher thermal conductivity than graphite film
22.06.2018 | Chalmers University of Technology

All articles from Materials Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Temperature-controlled fiber-optic light source with liquid core

In a recent publication in the renowned journal Optica, scientists of Leibniz-Institute of Photonic Technology (Leibniz IPHT) in Jena showed that they can accurately control the optical properties of liquid-core fiber lasers and therefore their spectral band width by temperature and pressure tuning.

Already last year, the researchers provided experimental proof of a new dynamic of hybrid solitons– temporally and spectrally stationary light waves resulting...

Im Focus: Overdosing on Calcium

Nano crystals impact stem cell fate during bone formation

Scientists from the University of Freiburg and the University of Basel identified a master regulator for bone regeneration. Prasad Shastri, Professor of...

Im Focus: AchemAsia 2019 will take place in Shanghai

Moving into its fourth decade, AchemAsia is setting out for new horizons: The International Expo and Innovation Forum for Sustainable Chemical Production will take place from 21-23 May 2019 in Shanghai, China. With an updated event profile, the eleventh edition focusses on topics that are especially relevant for the Chinese process industry, putting a strong emphasis on sustainability and innovation.

Founded in 1989 as a spin-off of ACHEMA to cater to the needs of China’s then developing industry, AchemAsia has since grown into a platform where the latest...

Im Focus: First real-time test of Li-Fi utilization for the industrial Internet of Things

The BMBF-funded OWICELLS project was successfully completed with a final presentation at the BMW plant in Munich. The presentation demonstrated a Li-Fi communication with a mobile robot, while the robot carried out usual production processes (welding, moving and testing parts) in a 5x5m² production cell. The robust, optical wireless transmission is based on spatial diversity; in other words, data is sent and received simultaneously by several LEDs and several photodiodes. The system can transmit data at more than 100 Mbit/s and five milliseconds latency.

Modern production technologies in the automobile industry must become more flexible in order to fulfil individual customer requirements.

Im Focus: Sharp images with flexible fibers

An international team of scientists has discovered a new way to transfer image information through multimodal fibers with almost no distortion - even if the fiber is bent. The results of the study, to which scientist from the Leibniz-Institute of Photonic Technology Jena (Leibniz IPHT) contributed, were published on 6thJune in the highly-cited journal Physical Review Letters.

Endoscopes allow doctors to see into a patient’s body like through a keyhole. Typically, the images are transmitted via a bundle of several hundreds of optical...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Munich conference on asteroid detection, tracking and defense

13.06.2018 | Event News

2nd International Baltic Earth Conference in Denmark: “The Baltic Sea region in Transition”

08.06.2018 | Event News

ISEKI_Food 2018: Conference with Holistic View of Food Production

05.06.2018 | Event News

 
Latest News

Graphene assembled film shows higher thermal conductivity than graphite film

22.06.2018 | Materials Sciences

Fast rising bedrock below West Antarctica reveals an extremely fluid Earth mantle

22.06.2018 | Earth Sciences

Zebrafish's near 360 degree UV-vision knocks stripes off Google Street View

22.06.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>