Piezomagnetic ε-Fe2O3 crystals

  • Alfonso from ICMAB-CSIC
  • From Spain
  • Responsive
  • Patents for licensing

Summary of the technology

A new synthesis method to produce ε-Fe2O3 nanoparticles and its processing under high pressures and temperatures. ε-Fe2O3 nanoparticles are suitable for magnetic memories or wireless communication devices


Details of the Technology Offer

ε-Fe2O3 presents a large magnetic anisotropy that makes it interesting for technological applications related to magnetic memories and to the development of self-biased non-reciprocal devices which are appealing for the forthcoming generations of wireless communications.

ε-Fe2O3 nanoparticles should be above 25 nm to retain their magnetization. There are several methods to prepare these nanoparticles, but none of them is scalable, making impossible an industrial application.

We present a new method for the synthesis of piezomagnetic ε-Fe2O3 nanoparticles of sizes above 25 nm. The nanoparticles can be used for the manufacturing of magnetic memories or wireless communication devices as self-biased non-reciprocal devices, such as miniaturized circulators for highfrequency (above 100 GHz) wireless communications.

Main innovations and advantages
Easily scalable and sustainable synthesis.

 Piezomagnetic property of ε-Fe2O3 makes it possible to obtain magnetized parts by sintering the material under uniaxial pressure.
 Magnetized nanoparticles can be used in planar microstrips circulators.

Current development status

Laboratory prototypes


5G and 6G communications

Desired business relationship

Patent licensing

Technology development

New technology applications

Intellectual property status

  • Patent already applied for
  • Patent application number :EP23382201

Related Keywords

  • Electronics, IT and Telecomms
  • Communications
  • Telephone Related
  • Data Communications
  • Local area networks (including voice/data PBX systems)


The Institute of Materials Science of Barcelona​ (ICMAB) is a Severo Ochoa Centre of Excellence research center which beongs to the Consejo Superior de Investigaciones Científicas (CSIC) and is governed by a Foundation board.

The Institute was set up in 1987 and subsequently, in April 1991, the laboratories were opened at the Campus of the Autonomous University of Barcelona (UAB). It is part of the Barcelona Nanotechnology Cluster in Bellaterra.

The aim of the institute is to carry out research aimed at obtaining and characterising materials of industrial interest. Its activities are based on the synthesis, preparation, crystallization and characterisation of functional high-performance materials and nanomaterials, which in some cases have led to the construction of device prototypes based on these materials.

Studies and improvements both of conventional materials, as well as new molecular, supramolecular, magnetic, superconducting and porous materials etc. are being developed through projects and research contracts. There are currently 9 ERC funded projects at ICMAB.

To develop these activities, at present there are 57 permanent staff among researchers and back up personnel together with 80 non-permanent staff divided into eight researgh groups, one general unit service, and one unit of Scientific and Technological Services.

In 2016 the ICMAB reached the 100.000 citations, and it is currently the first centre, among the CSIC centres, in the Nature Index. Each permanent researcher publishes close to 5 articles per year in Journals with a very high impact factor.

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