کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1803693 1024626 2008 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Role of interparticle coupling on the tunneling magnetoresistance of granular films in interacting superparamagnetic system
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Role of interparticle coupling on the tunneling magnetoresistance of granular films in interacting superparamagnetic system
چکیده انگلیسی

A phenomenological model is employed to explain the departure of H/T scaling of tunneling magnetoresistance (TMR) in Co0.43(ZrO2)0.57 granular films (see [B.J. Hattink, M. García del Muro, Z. Konstantinović, X. Batlle, A. Labarta, Phys. Rev. B 73 (2006) 045418]). The model bases on the modification of Langevin function by taking into account the field-dependent correlation length, in the framework of Inoue–Maekawa model. Both TMR–H and TMR–H/T curves can be reproduced very well by this model, indicating that the interparticle coupling plays an important role on TMR in the interacting superparamagnetic systems. The influence of anisotropy and spin polarization of the magnetic particles on TMR–H/T curves is also discussed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 320, Issue 5, March 2008, Pages 642–645
نویسندگان
, , ,