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Magnetic nanomaterials (nMatMag)

The aim of the « Magnetic Nanomaterials »(nMatMag) activity is to correlate the magnetic and transport behavior of magnetic nanomaterials and nanodevices to their structure and synthesis process in order to be able to tune and optimize their properties.
We then part of our work concerns the development of new local methods for measuring the magnetic and structural properties at the

nanometer scale and other is about the progress of new method in synthesis.
The systems we study present strong technological interests, in particular in the field of spintronics and magnetic recording. The applications in the field of life sciences, with the development of nanomaterials for therapeutic application form also part of our concerns.

The themes in the « Magnetic Nanomaterials » activity are articulated around three points:

The development of new methods for the local analyses of the magnetic properties by methods derived from electronic microscopy
       - EMCD
       - L3/L2
       - Holography

The study of magnetic nanomaterials and nanodevices
       - nanoparticules, nanowires
       - magnetoresistive multi-layer (magnetic
       tunnel junctions and giant
       magneto-resistance devices)
       - thin layers and multilayers of magnetic
       oxides

The study of magnetic properties in the field of the ultra high frequency


Lorentz microscopy and holography highlighting the magnetic fields in a layer of FePd at perpendicular magnetization (CEA-Grenoble Sample)

Au nanoparticle attached on a Co nanostick
(Sample : LPCNO-INSA)

Through techniques of elaboration, mainly “sputtering” for thin films, and of characterization of devices, our aim is to understand how the modifications, at the nanometer scale of the atomic and electronic structure, of these systems modify their magnetic and magnetotransport behaviors.
The structural characterizations are carried out by TEM, diffraction and reflectivity of x-rays (for the systems in thin and multi-layer layers), WAXS and SAXS (for the nano-objects) and AFM.
We perform magnetic measurements by using the traditional experimental means of which we lay out:
       - Measurements of cycle of magnetization by
         Kerr effect
       - Magnetization measurements by VSM
       - MFM

 

The themes nMatMag includes thus three research operations devoted one to the development of new local methods of analysis the two others being studied magnetic of nanoobjets and devices<

-  Opérations de recherche :

       •  New local methods of analysis of the magnetic properties

       •  Study of magnetic nanomaterials and nanodevices

       •  The study of magnetic properties in the field of the ultra high frequency

-  Moyens d’élaboration et de microfabrication

 

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