Phase transformations and physical зroperties of nanodimensional fe50pt50 (30 nm)/sio2(100 nm)/si(001) film system

In this paper, we study conditions of the magnetically ordered L10(FePt) phase with a face-centered tetragonal lattice in the nanodimensional Fe50Pt50 (30 nm)/SiO2(100 nm)/Si(001) film system at annealing in nitrogen. We also investigate its structure, morphology, electric and magnetic properties. On the experimental side, we show that the magnetically ordered L10(FePt) phase with rectangular grains is formed in Fe50Pt50 films after annealing at 720 K. Its formation during further annealings results in the increase of Fe50Pt50 film coercitivity up to 1000 Gs at the saturation magnetization of about 945 ems/cm2. The direction change of the applied magnetic field doesn’t cause any essential changes in the hysteresis loop form due to its isotropy.

Publication year: 
2010
Issue: 
6
УДК: 
539.216.2:661.685
C. 98-102, укр., Іл. 7. Бібліогр.: 5 назв.
References: 

1. Seki T.O., Takahashi Y.K., Hono K. Microstructure and magnetic properties of FePt-SiO2 granular films with Agaddition // J. of Applied Physics. — 2008. — 103. — P. 023910(1—7).
2. Breitling A., Goll D. Hard magnetic L10-FePt thin films and nanopatterns // J. of Magnetism and Magnetic Materials. — 2008. — 320. — P. 1449—1456.
3. Yang E., Laughlin D.E. L10-FePt-oxide columnar perpendicular media with high coercivity and small grain size // J. of Applied Physics. — 2008. — 104. — P. 023904(1—3).
4. Chun Feng, Bao-He Li, Yang Liu et al. Improvement of magnetic property of L10-FePt film by FePt/Au multilayer structure // Ibid. — 103. — P. 023916(1—4).
5. Камзин А.С., Снеткова Е.В., Янг З. и др. Исследования тонких пленок FePt, синтезированных методом последовательного распыления // Письма в ЖТФ. — 2008. — 34, вып. 1. — С. 57—64.

AttachmentSize
2010-6-15.pdf715.23 KB

Тематичні розділи журналу

,