Role of heterostructures and multiple magnetic phases in the low-field magnetization of Fe-Cr GMR multilayers

Physics – Condensed Matter – Other Condensed Matter

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

19 pages

Scientific paper

10.1063/1.2405733

Zero-field-cooled (ZFC) and field-cooled (FC) magnetization along with ac-magnetization vs. temperature and m-h loop measurements are reported for two series of ion-beam sputtered Fe-Cr GMR multilayers where the interface roughness is different. The exchange coupling between the Fe layers varies from ferromagnetic (FC) to antiferromagnetic (AF) depending upon the Cr layer thickness. The ZFC and FC magnetization data follow different curves below an irreversible temperature ($T_{irr}$). The FC data shows a $T^{3/2}$ thermal demagnetization behavior at lower temperatures with very small spin-wave stiffness constant (as compared with that of bulk Fe obtained from Bloch's $T^{3/2}$ law) but it goes as 1/T at higher temperatures (above ($T_{irr}$)). This behavior is interpreted in terms of the coexistence of spin-glass (SG)/superparamagnetic, FM and AF phases. ac-magnetization vs. temperature shows a peak at $T_g$. This peak shifts towards higher temperatures and its amplitude decreases with increasing frequency of the driving ac field.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Role of heterostructures and multiple magnetic phases in the low-field magnetization of Fe-Cr GMR multilayers does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Role of heterostructures and multiple magnetic phases in the low-field magnetization of Fe-Cr GMR multilayers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Role of heterostructures and multiple magnetic phases in the low-field magnetization of Fe-Cr GMR multilayers will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-350039

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.