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SUMMARY:Operando muSR experiment on nano-cystal growing of the Fe-based ma
 gnetic material FINEMET(R)  under external fields
DTSTART;VALUE=DATE-TIME:20220829T160000Z
DTEND;VALUE=DATE-TIME:20220829T162000Z
DTSTAMP;VALUE=DATE-TIME:20220826T110341Z
UID:indico-contribution-3711@indico.stfc.ac.uk
DESCRIPTION:Speakers: Akihiro Koda (KEK/J-PARC)\nIn recent years\, there h
 ave been increasing opportunities to consider about energy issues on a glo
 bal scale\, and the development of energy-saving technologies in various f
 ields is highly desired. It is known that Fe-Cu-Nb-Si-B nanocrystalline al
 loy\, so-called FINEMET(R)\, have higher magnetic flux density\, higher li
 nearity\, and higher temperature stability than conventional materials. Na
 no-crystals of FINEMET is grown by heat treatment of Fe-based amorphous al
 loys\, showing different $B$—$H$ curves for various conditions of the ma
 gnetic field application during the heat treatment. However\, the nanocrys
 tallization process during heat treatment under magnetic fields has not be
 en fully understood. To investigate elementary processes such as grain gro
 wth of nanocrystals\, we have performed operando muon spin rotation experi
 ments. It was reported that a remarkable time variation in crystal growing
  under several magnetic fields is seen [M. Ohta {¥it et al}.\, JPS Conf. 
 Proc. {¥bf 33}\, 011053 (2021)]. Recently\, more detailed analysis of tim
 e spectra with varying temperatures in the magnetic field has revealed the
  emergence of two distinct phases around the nanocrystal nucleation temper
 ature. It is discussed how these two phases are related to nanocrystal nuc
 leation and grain growth\, also using the other technique such as transmis
 sion electron microscope (TEM) measurements and theoretical calculations.\
 n\nhttps://indico.stfc.ac.uk/event/53/contributions/3711/
LOCATION:Science and Technology Campus\, University of Parma
URL:https://indico.stfc.ac.uk/event/53/contributions/3711/
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