Source: https://www.docme.ru/doc/257061/paper-ov
Timestamp: 2019-04-19 13:02:09+00:00

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the magnetic field and current.
parallelen Orientierung des Magnetfeldes und -stroms.
I. V. Ovsienko et al.
diameter is 63 nm, and inner diameter 8 nm).
Bild 1. HRTEM-Abbildung von MWCNTs des ersten Typs (AuГџendurchmesser 63 nm und Innendurchmesser 8 nm).
well as negligible spin orbit effects.
magnetic phases, depending on temperature, the relative orientation of the magnetic field and current and ordering samples.
We have used two different types of MWCNTs for our studies.
catalyst. Fig. 1 presents typical TEM image of these MWCNTs.
are different magnification (outer diameter is 75 nm, and inner diameter 5 вЂ“ 8 nm).
unterschiedliche AuflГ¶sungen (AuГџendurchmesser 75 nm und Innendurchmesser 5 вЂ“ 8 nm).
(cementite) present in the sample too.
are presence in the inner cavity of MWCNT .
samples with a size of (86361) mm.
experimental and 2: calculated values (assuming only classical scattering mechanisms); Dr = f (ln T) dependence (b).
Streumechanismus); Dr = f (ln T) AbhГ¤ngigkeit (b).
? I and (b) B || I; T = 293 K.
and (b) B || I; T=293 K.
the electrical conductivity of the sample considering only classical scattering mechanisms.
? I and (b) B || I; T = 77 K.
und (b) B || I; T = 77 K.
current and magnetic field is ~2.3%, and in case of parallel orientation of current and field вЂ“ ~4.0%.
charge carriers leading to spin-dependent scattering of electrons.
charge carriers on the spin magnetic particles of the metal atoms.
and, thus, the electrical resistance decrease. A characteristic feature of GMR is a hysteresis phenomenon in the case of magnetoresistance dependence on magnetic field.
T = 293 K and (b) T = 77 K; B ? I.
293 K und (b) T = 77 K; B ? I.
where RD R || вЂ“ R? .
decrease in spin-polarized scattering of charge carriers in a magnetic field and, thus, to an increase of conductivity of the sample.
With decreasing temperature there is a вЂњfrozenвЂќ spin-orbit scattering and the spin polarization can be achieved only at large values of the magnetic field.
T = 293 K and (b) T=77 K; B || I.
293 K und (b) T = 77 K; B || I.
NATO (project N UKR.SFPP 984243) and by the Deutsche Forschungsgemeinschaft (DFG).
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