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| Transient absorption spectrum, measured at 110 μJ/cm2, of gold only and gold/FeO nanocrystals with, overlaid, three black traces corresponding to the positions of the maxima and of the zeros. |
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| (a,b) Magnetic field dependences of magnetization of SCMO23 and SCMO100 samples at T = 10 K measured after FC. Insets show a low field part of hysteresis loops on the extended scale. (c) Size dependence of spontaneous magnetization M0 and magnetization MS in H = 15 kOe at T = 10 K. (d) Coercive field of SCMO samples as a function of the particle size. Solid line is linear fit to the expression HC = a + b/D. |
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| Black circles: particle locations; open ellipses: trap locations for a 20a0 ×20a0 section of a kagome ice sample. Colored circles indicate vertex types: N0 (blue), N1 (green), N2 (yellow) and N3 (red). (a) The positive biased ice-rule-obeying state. (b) The monopole state consisting of an ordered lattice of N0 and N3 vertices. (c) A finite-temperature ice-rule-obeying nonbiased state. (d) A high-temperature paramagnetic state where the vertex types are uncorrelated. |
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| Logarithmic conductance as a function of T ^1/2 for the core–shell nanoparticles. Inset: sketch of the spin-polarized tunneling between two neighboring core–shell particles where the shells act as a tunneling barrier. |
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| (a-d) Temperature dependence of real component of ac susceptibility (χ0) measured during heating at different frequencies and magnetic ac field of 10 Oe for SCMO samples. Insets show the imaginary part (χ00) of ac susceptibility measured at different frequencies and magnetic ac field of 10 Oe. |
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| Heating power per sample volume Ac vs particle concentration c. Systems with different spatial distributions (regular simple cubic and hexagonal structures as well as random repellent and free particles) are compared. In all cases an optimal density exists. |
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| Time evolution of three-temperature model for a large laser-fluence case Te(0) = 1.6. The critical slowing down of the spin system is identified as the plateau in the figure. The inset defines a slowdown time τd . The smaller inset shows the magnified region in the vicinity of the maximum temperature. |
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| Selected magnetoresistance curves with the external field H oriented parallel to the current I measured after cooling in a field of 0H D 0:2 T from 320 K to the respective temperatures. The lines are the best fits according to equation (4). |
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| Temperature dependence of Heb in Co/CoO/Au samples measured for the three nanostructure sizes S (squares), M (dots), and L (triangles). |
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| XMCD photoelectron emission microscopy asymmetry images of L10-ordered FePd (a) and FePt (b) taken at the Fe L3-absorption edge for the demagnetized domain state at room temperature and in zero magnetic field. The insets to the upper right corner show the result of micromagnetic simulations. |
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| Classical phase diagram. F, ferromagnetic phase; CAF, collinear antiferromagnetic phase; CH, collinear helicoidal phase; H, helicoidal phase. |
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| The ice configuration possessing the most flippable plaquettes is the squiggle state, shown here within a 40-site tetragonal cell. Arrows show the displacement of protons within Ic water ice or, equivalently, the orientation of spins in spin ice. The squiggle state possesses a net magnetic flux, orientated along a [100] axis. |
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| (a) Schematic showing the spin structure of a meronlike state with opposite chirality; (b) schematic showing the trilayer discs and direction of the electron beam for imaging, and (c) LTEM under-focus image, and (d) reconstructed magnetic induction color map. |
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| Phenomenological phase diagram for the spin-orbital model. The exchange energy scale in the problem sets the transition temperature TO for orbital order, which in turn drives the structural transition. eps_0 is the energy scale below which long-wavelength fluctuations are suppressed. There are two separate continuous orbital and magnetic transitions for eps<<eps_0 (shown as dotted and dashed lines, respectively) and one simultaneous first-order transition for eps>>eps_0 (shown as a solid line). |
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| The magneto-optical images of a Gd24Fe66.5Co9.5 continuous film obtained after the action of a sequence of N 100 fs laser pulses. |
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| Crystal structure of Ba3CoSb2O9. The blue single octahedron is a CoO6 octahedron with a Co2+ ion at the center, and the face-sharing Sb2O9 double octahedron is shaded ochre. Magnetic Co2þ ions form a regular triangular lattice in the ab plane. Dotted lines denote the chemical unit cell. |
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| The three contributions in the generalized LLG equation, the bare precession arising from the effective magnetic field, and the superimposed effects from the Gilbert damping and the moment of inertia. |
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| Atomistic spin dynamics simulation of laser-induced spin dynamics of a model GdFe system with either AFM or FM sublattice coupling. The spin dynamics of Gd is shown as function of the spin dynamics of Fe. |
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| Relative spin (filled circles) and orbital (open circles) magnetic moments of Fe+ n clusters normalized to the atomic values (muS= 4 muB and muL= 2 muB). While the spin moment remains at 60%–90%, the orbital value is strongly reduced already for Fe3+ . |
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| Zig-zag wall in a parallel plate capacitor. The pressure acting on each segment leads to non-zero force acting on the wall (a). |
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| Phase diagram of the STNO autonomous dynamics measured by MRFM. |
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| Magnon-drag detection principle and geometry of the device. |
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| Compilation of the ac susceptibility frequency scans of Dy2Ti2O7 and Ho2Ti2O7. An Arrhenius fit to the low-temperature Dy2Ti2O7 relaxation is shown, along with a 6J_DTO_eff Arrhenius law with arbitrary frequency scaling. |
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| (a) Resistance change Delta R due to 20DWs in a Pt=Co=Pt strip as a function of Ga dose. (b) Perpendicular anisotropy as a function of Ga dose. The red line is an exponential fit. (c) Normalized DW resistivity as a function of anisotropy. The red line is the theoretical result of the Levy-Zhang model . The same data are plotted in (d) as a function of DW width, showing the 1=Delta^2 dependence. |
