Paramagnetic ions in water shorten the spin-lattice relaxation time T1 of protons. The effectiveness with which takes place depends not only on ion concentration, but also environment paramagnetic ion. In some cases where is bound to a large molecule such as DNA, it shortens proton greater extent than when solution. By measuring by pulsed nuclear magnetic resonance method, we have studied binding transition metal DNA. We obtained estimates for number available sites well information type...

The giant magnetoresistance (GMR), magnetization reversal, and domain structure of magnetron sputtered spin valve [NiFe/Au/Co/Au]N multilayers consisting ferromagnetic layers with alternating in-plane (NiFe) out-of-plane (Co) magnetic anisotropy has been investigated. For 0.4<tCo<1.2 nm GMR dependencies characterized by a linear almost nonhysteretic dependence resistance on the field were found. Within hysteretic range reversal Co layers, for N>3, neighboring observed to...

Defined perpendicular anisotropy gradients in the Co sublayers of a [Co(0.6 nm)/Au(2 nm)](3) sputter-deposited multilayer have been introduced by light ion bombardment through wedged Au stopper layer. Within such layer system, domain walls between up- and down-magnetized areas are controllably movable an external homogeneous magnetic field. This method system is very promising for controlled particle transport within stray fields moving walls.

Magnetization reversal processes in Au/Co/Au-wedge/Co/Au pseudo-spin-valve structures characterized by perpendicular anisotropy of 0.6-nm-thick Co layers were investigated magneto-optical Kerr effect. The samples deposited on a Ti/Au buffer layer differing Au-layer thickness (different surface roughness and crystallite size). distinctive influence the dependences switching fields, energy effective interlayer coupling, versus Au spacer is presented. In particular, increasing buffer-layer...

The perpendicular exchange bias in NiO(antiferromagnet)/Co(ferromagnet) polycrystalline layer films is studied. It found that the NiO forces Co magnetization to be oriented film plane a greater thickness range than Au/Co/Au system. Simultaneously, large coercivity and significant field were observed are owing interlayer coupling between Co, which supports magnetic anisotropy of layer. These findings confirmed by magnetometry magnetoresistance measurements.

Dzyaloshinskii-Moriya interaction (DMI) is a well-known phenomenon in ferromagnetic/heavy metal or ferromagnetic/nonmagnetic oxide thin layered films. Here, we show that DMI also found exchange biased ferromagnetic/antiferromagnetic layer systems and it independent of the macroscopic direction interlayer bias coupling. Using relation between thickness ferromagnetic asymmetric domain wall propagation at external magnetic fields applied plane perpendicular to sample Au/Co/NiO system, strength...

A concept of a magnetoresistive sensor for magnetic fields based on Au/Co-wedge/Au/Co/Au multilayer is proposed. The wedged Co layer characterized by laterally changing coercivity resulting from gradient perpendicular anisotropy. Its magnetization reversal in field takes place movement single domain wall the direction parallel to anisotropy gradient. has been investigated magnetooptical and measurements. resistance proposed film system correlates well with position thus it can be used sense fields.

We report on a specific magnetostatic coupling in sputter deposited (Ni80Fe20∕Au∕Co∕Au)10 multilayers of alternating in-plane and out-of-plane magnetic anisotropies. demonstrate the basis complementary studies (magnetoresistance, conventional magnetometry, element soft x-ray resonant scattering hysteresis measurements) that magnetization reversal Ni–Fe layers is strongly influenced by originating from stripe domain stray fields Co layers.

The Laporte rule dictates that one- and two-photon absorption spectra of inversion-symmetric molecules should display alternatively forbidden electronic transitions; however, for organic fluorophores, drawing clear distinction between the symmetric- non-inversion symmetric is often obscured due to prevalent vibronic interactions. We take advantage consecutive single- double-protonation break then reconstitute inversion symmetry in a nominally diketopyrrolopyrrole, causing large changes...

Planarization of the pyrrolopyrrole chromophore switches mechanism non-radiative deactivation from intersystem crossing to internal conversion.

(Co/Au)N ultrathin multilayers with perpendicular and in-plane magnetic anisotropy were studied experimentally using a combination of ferromagnetic resonance, magneto-optical magnetometry microscopy (with both out-of-plane magnetization-sensitive longitudinal polar Kerr effects), force (MFM). Three-dimensional magnetization distributions reconstructed from micromagnetic simulations complemented by the measured parameters observations MFM. It is shown that, in reorientation phase transition...

The influence of ion-beam mixing (IBM) on the structure, magnetic, magneto-optical, and optical properties Fe/Si multilayered films (MLF's) is investigated. Mixing was performed with ${\mathrm{Ar}}^{+}$ ions an energy 80 keV a dose $1.5\ifmmode\times\else\texttimes\fi{}{10}^{16} {\mathrm{Ar}}^{+}/{\mathrm{cm}}^{2}.$ It shown that IBM destroys layered structure MLF down to depth about 110--150 nm, leads formation phase which characterized have perfect crystalline low coercivity, Curie...

A magnetic multilayer of the structure substrate/Pt-15 nm/Co-0.8 nm/Pt-wedge(0-7 nm)/Co-0.6 nm/Pt-2 nm is characterized by perpendicular anisotropy both Co layers. For a Pt spacer thickness tPt≤2.6nm, magnetization reversal Co-layers occurs cooperatively, while for larger tPt, it sequentially. The Co-layer with 0.6 (CoS) magnetically softer than second one (CoH). In 2.6≤tPt≤3.0 range, there are significant changes switching field due to strong gradient interlayer coupling. this region, in...

The (110) oriented V/Fe multilayers were prepared at room temperature using UHV magnetron sputtering.As a substrate we have used Si(100) wafers with an oxidised surface.The surface chemical composition and the cleanness of all layers was checked in situ, immediately after deposition, transferring samples to analysis chamber equipped X-ray photoelectron spectroscopy.The structure has been studied ex situ by low-and high-angle diraction.The modulation wavelength determined from spacing between...

The influence of He + (10 keV) ion bombardment on magnetic properties sputter deposited Ni 80 Fe 20 /Au/Co/Au layered films was studied.The variable parameters were the thickness Co layer or Au spacer and dose.The magnetooptical Kerr measurements performed samples with wedge shaped layers.With increasing dose helium ions following changes in observed: (i) a decrease range corresponding to perpendicular anisotropy, (ii) coercive field (H C ), (iii) an increase ferromagnetic coupling between layers.

<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> The influence of the Co layer thickness as well number repetitions <emphasis emphasistype="italic">N</emphasis> on magnetic properties (Co/Au)<formula formulatype="inline"><tex Notation="TeX">$_{\rm N}$</tex></formula> multilayers was investigated systematically using magneto-optical techniques, vibrating sample magnetometry, and force microscopy. studies focused characteristics hysteresis loops...

<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> Material selective sensitivity of a magneto-optical polar Kerr effect to magnetizations films from different materials in multilayer system is presented. The method supported by rigorous modeling magneto-optic response the and experimental demonstration on periodic cobalt-permalloy multilayers [Ni<formula formulatype="inline"><tex Notation="TeX">$_{80}$</tex></formula>Fe<formula...

The influence of 200 keV Ar-ion irradiation on the interlayer coupling in Fe/Cr multilayers exhibiting giant magnetoresistance (GMR) effect is studied by conversion electron Mössbauer spectroscopy (CEMS), vibrating sample magnetometer hysteresis loops, magnetoresistivity, and electric resistivity measurements supplemented small-angle x-ray diffraction. increase dose causes an interface roughness, as evidenced Fe step sites detected CEMS. modification microstructure induces changes...