scholarly journals Insight into the magnetic behavior of Sr2IrO4: A spontaneous magnetization study

2019 ◽  
Vol 383 (15) ◽  
pp. 1806-1809 ◽  
Author(s):  
Imtiaz Noor Bhatti ◽  
A.K. Pramanik
Keyword(s):  
Spontaneous Magnetization ◽  
Magnetic Behavior ◽  
Magnetization Study ◽  
Insight Into

Laser ablated pure non-crystalline Co thin films for inductors for ultra-high frequencies

2001 ◽  
Vol 674 ◽  
Author(s):  
V. Madurga ◽  
J. Vergara ◽  
C. Favieres
Keyword(s):  
Thin Films ◽  
Domain Walls ◽  
Spontaneous Magnetization ◽  
Magnetic Domain ◽  
Hysteresis Loops ◽  
Magnetic Behavior ◽  
Soft Magnetic ◽  
High Frequencies ◽  
Magnetic Domain Walls ◽  
Deposited Films

ABSTRACTNon-crystalline Co thin films have been prepared by pulsed laser ablation deposition. From the M-H hysteresis loops measurements, a soft magnetic behavior is observed. Néel type magnetic domain walls are observed in the as-deposited films. The spontaneous magnetization, Ms(T = 300 K), is ≍ 860 emu/cm3. After annealing at 500 oC, Ms(T = 300 K) is ≍ 1460 emu/cm3. The extrapolated to zero K resistance decreases almost two orders of magnitude from the as deposited samples to the crystallized heated at 500 °C ones. A trilayer Co/Cu/Co has shown a real part magnetic susceptibility of 120 at 100 MHz. In the 100 MHz to 1 GHz frequency range, a perpendicular bias magnetic field increased this value up to 270, remaining almost constant for all range.

scholarly journals Magneto-mechanical coupling of single domain particles in soft matter systems

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Julian Seifert ◽  
Karin Koch ◽  
Melissa Hess ◽  
Annette M. Schmidt
Keyword(s):  
Soft Matter ◽  
Magnetic Particles ◽  
Biological Fluids ◽  
Magnetic Behavior ◽  
Structure Property ◽  
Mechanical Coupling ◽  
Surface Functionality ◽  
Structure Property Relationships ◽  
Recent Advancement ◽  
Insight Into

Abstract Combining inorganic magnetic particles with complex soft matrices such as liquid crystals, biological fluids, gels, or elastomers, allows access to a plethora of magnetoactive effects that are useful for sensing and actuation perspectives, allowing inter alia to explore and manipulate material properties on the nanoscale. The article provides a comprehensive summary of recent advancement on employing magnetic nanoparticles either as tracers for dynamic processes, or as nanoscopic actuating units. By variation of the particle characteristics in terms of size, shape, surface functionality, and magnetic behavior, the interaction between the probe or actuator particles and their environment can be systematically tailored in wide ranges, giving insight into the relevant structure–property relationships.

MAGNETIC RESONANCE INVESTIGATION OF THE MAGNETIC TRANSITION IN TDAE-C60

1992 ◽  
Vol 06 (23n24) ◽  
pp. 3947-3951 ◽  
Author(s):  
P. Venturini ◽  
D. Mihailović ◽  
R. Blinc ◽  
P. Cevc ◽  
J. Dolinšek ◽  
...  
Keyword(s):  
Magnetic Phase ◽  
Spontaneous Magnetization ◽  
Magnetic Transition ◽  
Magnetic Ordering ◽  
Magnetic Behavior ◽  
Line Broadening ◽  
Powder Samples ◽  
Magnetic Resonance Investigation ◽  
Long Range Ordering ◽  
Finite Particle

The ESR and NMR lines in powder samples of TDAE- C 60 do not show the expected frequency shifts due to long range ordering in the low temperature magnetic phase, but instead show only a relatively small line broadening below Tc=16 K. The temperature dependence of the lineshapes in ESR, the absence of a spontaneous magnetization as well as other magnetic properties suggest that the magnetic ordering below Tc=16 K is local and random, i.e. spin-glass like, rather than ferromagnetic. The possible finite-particle-size effects and possible microscopic mechanisms for the observed magnetic behavior are discussed.

MAGNETIC BEHAVIOR OF Al2GdNi COMPOUND

2006 ◽  
Vol 20 (08) ◽  
pp. 401-408 ◽  
Author(s):  
M. COLDEA ◽  
V. POP ◽  
L. G. PASCUT ◽  
D. TODORAN ◽  
R. PACURARIU
Keyword(s):  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Magnetic Fields ◽  
Exchange Interaction ◽  
Magnetic Moment ◽  
Magnetic Measurements ◽  
Spontaneous Magnetization ◽  
Magnetic Behavior ◽  
Spin Fluctuations ◽  
Local Exchange

The magnetic properties of Al 2 GdNi compound have been investigated using magnetic measurements in the temperature range 4.2–300 K and with magnetic fields of up to 9 T. Al 2 GdNi orders ferromagnetically at Tc = 36.7 K with a magnetic moment of 7.25 μB/ f.u. , obtained from the spontaneous magnetization extrapolated to 0 K. The magnetic susceptibility obeys the Curie–Weiss law with μ eff = 8.6 μB/ f.u. and θp = 26.8 K . The results are discussed in terms of the Ruderman–Kittel–Kasuya–Yosida theory, the polarization of 5d electrons by the local exchange interaction 4f-5d and the spin fluctuations on Ni sites.

Computational insight into magnetic behavior and properties of the transition metal complexes with redox-active ligands: a DFT approach

2018 ◽  
Vol 90 (5) ◽  
pp. 811-824 ◽  
Author(s):  
Vladimir I. Minkin ◽  
Andrey G. Starikov ◽  
Alyona A. Starikova
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Magnetic Behavior ◽  
Dft Method ◽  
Correct Choice ◽  
Model Compounds ◽  
Redox Active Ligands ◽  
Redox Active ◽  
Insight Into

AbstractVarious aspects related to the use of DFT method for the study of magnetic, geometry and energetic properties of transition metal complexes with redox-active ligands are considered. Particular attention is given to the correct choice of model compounds and methodology of the calculations.

scholarly journals Lamellar nickel hydroxy-halides: anionic exchange synthesis, structural characterization and magnetic behavior

2014 ◽  
Vol 2 (22) ◽  
pp. 4449-4460 ◽  
Author(s):  
Mostafa Taibi ◽  
Noureddine Jouini ◽  
Pierre Rabu ◽  
Souad Ammar ◽  
Fernand Fiévet
Keyword(s):  
Structural Characterization ◽  
Magnetic Behavior ◽  
Magnetic Interaction ◽  
Two Dimensional ◽  
Interaction Mechanisms ◽  
Anionic Exchange ◽  
Magnetic Investigation ◽  
Insight Into

The structural and magnetic investigation of new nickel-layered hydroxy-halides LHS-Ni-X (X = Cl, Br, and I) gives new insight into the magnetic interaction mechanisms in two-dimensional α-Ni(OH)2 systems.

Calibration problems in hydrogen luminosities

1966 ◽  
Vol 24 ◽  
pp. 322-330
Author(s):  
A. Beer
Keyword(s):  
Galactic Structure ◽  
B Stars ◽  
Insight Into

The investigations which I should like to summarize in this paper concern recent photo-electric luminosity determinations of O and B stars. Their final aim has been the derivation of new stellar distances, and some insight into certain patterns of galactic structure.

Stochasting modeling of planetary ring systems

1984 ◽  
Vol 75 ◽  
pp. 461-469 ◽  
Author(s):  
Robert W. Hart
Keyword(s):  
Maximum Entropy ◽  
Ring System ◽  
The Sun ◽  
Ultimate State ◽  
Interparticle Interactions ◽  
Ring Systems ◽  
First Order ◽  
Planetary Ring ◽  
Insight Into

ABSTRACTThis paper models maximum entropy configurations of idealized gravitational ring systems. Such configurations are of interest because systems generally evolve toward an ultimate state of maximum randomness. For simplicity, attention is confined to ultimate states for which interparticle interactions are no longer of first order importance. The planets, in their orbits about the sun, are one example of such a ring system. The extent to which the present approximation yields insight into ring systems such as Saturn's is explored briefly.

Skeletal elements of crinoid echinoderms: High-resolution structural and microanalytical results

1983 ◽  
Vol 41 ◽  
pp. 194-195
Author(s):  
D. F. Blake ◽  
L. F. Allard ◽  
D. R. Peacor
Keyword(s):  
High Resolution ◽  
Marine Invertebrates ◽  
Sea Urchins ◽  
Structural Features ◽  
Sea Stars ◽  
High Resolution Tem ◽  
Relationship Of ◽  
The Relationship ◽  
Insight Into

Echinodermata is a phylum of marine invertebrates which has been extant since Cambrian time (c.a. 500 m.y. before the present). Modern examples of echinoderms include sea urchins, sea stars, and sea lilies (crinoids). The endoskeletons of echinoderms are composed of plates or ossicles (Fig. 1) which are with few exceptions, porous, single crystals of high-magnesian calcite. Despite their single crystal nature, fracture surfaces do not exhibit the near-perfect {10.4} cleavage characteristic of inorganic calcite. This paradoxical mix of biogenic and inorganic features has prompted much recent work on echinoderm skeletal crystallography. Furthermore, fossil echinoderm hard parts comprise a volumetrically significant portion of some marine limestones sequences. The ultrastructural and microchemical characterization of modern skeletal material should lend insight into: 1). The nature of the biogenic processes involved, for example, the relationship of Mg heterogeneity to morphological and structural features in modern echinoderm material, and 2). The nature of the diagenetic changes undergone by their ancient, fossilized counterparts. In this study, high resolution TEM (HRTEM), high voltage TEM (HVTEM), and STEM microanalysis are used to characterize tha ultrastructural and microchemical composition of skeletal elements of the modern crinoid Neocrinus blakei.

Structure and function of neural networks in the retina

1988 ◽  
Vol 46 ◽  
pp. 26-27
Author(s):  
Peter Sterling
Keyword(s):  
Ganglion Cells ◽  
Three Dimensional ◽  
Structure And Function ◽  
Synaptic Connections ◽  
Visual Axis ◽  
One Dimensional ◽  
Cat Retina ◽  
Ultrathin Sections ◽  
And Function ◽  
Insight Into

The synaptic connections in cat retina that link photoreceptors to ganglion cells have been analyzed quantitatively. Our approach has been to prepare serial, ultrathin sections and photograph en montage at low magnification (˜2000X) in the electron microscope. Six series, 100-300 sections long, have been prepared over the last decade. They derive from different cats but always from the same region of retina, about one degree from the center of the visual axis. The material has been analyzed by reconstructing adjacent neurons in each array and then identifying systematically the synaptic connections between arrays. Most reconstructions were done manually by tracing the outlines of processes in successive sections onto acetate sheets aligned on a cartoonist's jig. The tracings were then digitized, stacked by computer, and printed with the hidden lines removed. The results have provided rather than the usual one-dimensional account of pathways, a three-dimensional account of circuits. From this has emerged insight into the functional architecture.

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