ChemInform Abstract: Challenges in the Search for Magnetic Coupling in 3d/4f Materials: Syntheses, Structures, and Magnetic Properties of the Lanthanide Copper Heterobimetallic Compounds, RE2Cu(TeO3)2(SO4)2.

ChemInform ◽  
2014 ◽  
Vol 45 (22) ◽  
pp. no-no
Author(s):  
Jian Lin ◽  
Ping Chai ◽  
Kariem Diefenbach ◽  
Michael Shatruk ◽  
Thomas E. Albrecht-Schmitt
Keyword(s):  
Magnetic Properties ◽  
Magnetic Coupling ◽  
Heterobimetallic Compounds

Structural diversity and magnetic properties of six ferrocenyl monocarboxylate Mn(ii), Ni(ii) and Co(ii) complexes with 1D aqua, carboxyl or dinuclear hydroxyl bridges

CrystEngComm ◽  
2021 ◽  
Author(s):  
Misbha Rafiq Khan ◽  
Xiaoge Niu ◽  
Tianling Chen ◽  
Yan Liu ◽  
Zhongyi Liu ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Magnetic Coupling ◽  
Structural Diversity ◽  
Different Types ◽  
Structure Diversity

Six ferrocenyl monocarboxylate Mn(ii), Ni(ii) and Co(ii) complexes with different types of magnetic coupling bridges were synthesized successfully. 1–6 display intriguing structure diversity and magnetic properties.

scholarly journals Exploring the magnetic properties and magnetic coupling in SrFe12O19/Co1-xZnxFe2O4 nanocomposites

2021 ◽  
pp. 168095
Author(s):  
P. Maltoni ◽  
T. Sarkar ◽  
G. Barucca ◽  
G. Varvaro ◽  
D. Peddis ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Magnetic Coupling

scholarly journals Visualizing atomic structure and magnetism of 2D magnetic insulators via tunneling through graphene

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Zhizhan Qiu ◽  
Matthew Holwill ◽  
Thomas Olsen ◽  
Pin Lyu ◽  
Jing Li ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Deep Understanding ◽  
Magnetic Coupling ◽  
Atomic Scale ◽  
Scanning Tunneling ◽  
Tunneling Microscopy ◽  
Electronic And Magnetic Properties ◽  
Conducting Path ◽  
Magnetic Insulators ◽  
Quantum Technology

AbstractThe discovery of two-dimensional (2D) magnetism combined with van der Waals (vdW) heterostructure engineering offers unprecedented opportunities for creating artificial magnetic structures with non-trivial magnetic textures. Further progress hinges on deep understanding of electronic and magnetic properties of 2D magnets at the atomic scale. Although local electronic properties can be probed by scanning tunneling microscopy/spectroscopy (STM/STS), its application to investigate 2D magnetic insulators remains elusive due to absence of a conducting path and their extreme air sensitivity. Here we demonstrate that few-layer CrI3 (FL-CrI3) covered by graphene can be characterized electronically and magnetically via STM by exploiting the transparency of graphene to tunneling electrons. STS reveals electronic structures of FL-CrI3 including flat bands responsible for its magnetic state. AFM-to-FM transition of FL-CrI3 can be visualized through the magnetic field dependent moiré contrast in the dI/dV maps due to a change of the electronic hybridization between graphene and spin-polarised CrI3 bands with different interlayer magnetic coupling. Our findings provide a general route to probe atomic-scale electronic and magnetic properties of 2D magnetic insulators for future spintronics and quantum technology applications.

Studies of Magneto-Optical Recording in Multi-Magnetic-Layer Disk by Analytic and Simulating Approaches

1993 ◽  
Vol 313 ◽  
Author(s):  
Yoshiyuki Kawazoe ◽  
Xiao Hu ◽  
Shigeru Honma
Keyword(s):  
Computer Simulation ◽  
Magnetic Properties ◽  
External Field ◽  
Theoretical Estimate ◽  
Magnetic Layer ◽  
Magnetic Coupling ◽  
Optical Recording ◽  
Analytic Approach ◽  
Layer System

ABSTRACTThe effect of magnetic coupling in Multi-layer system is discussed by an analytic approach and computer simulation. The dependence of the enhancement of external field on the magnetic properties of the relevant materials is studied. Comparison between the theoretical estimate, simulation result and experimental observations are presented.

scholarly journals Theoretical investigation EuTiO3 in three structures optical, electric and magnetic properties

2018 ◽  
Vol 64 (6) ◽  
pp. 553
Author(s):  
Noureddine Lakouari
Keyword(s):  
Magnetic Properties ◽  
Optical Properties ◽  
First Principles ◽  
Formation Energy ◽  
Magnetic Coupling ◽  
Order Type ◽  
Antiferromagnetic Order ◽  
High Symmetry ◽  
Multiferroic Properties ◽  
Structural Deformations

We present a systematic first-principles study of the structural, magnetic and optical properties of perovskite-structure EuTiO3. This compound exists in different structures: cubic, tetragonal and presents multiferroic properties. Comparing the formation energy between tetragonal and cubic structures, the system has a tendency to symmetry lowering structural deformations composed of rotations of the oxygen octahedral, especially the I4/mcm phase is the most stable structure. Our calculations of the high symmetry cubic structural prototype show an antiferromagnetic order type G. We discuss the dynamical stability of Pm-3m, P4mm and I4-mcm structures, and the influence of some parameters on the magnetic coupling and the electrical polarization.

Structure and magnetic properties of monophenylphosphinate bridged chain polymers of manganese(II), [MnL2(HPhPO2)2]x (where L = HPhPO2H, CH3CONH2, H2O, HCONH(CH3), and C5H5N)

1992 ◽  
Vol 70 (3) ◽  
pp. 732-741 ◽  
Author(s):  
Jing-Long Du ◽  
Steven J. Rettig ◽  
Robert C. Thompson ◽  
James Trotter ◽  
Peter Betz ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Heavy Atom ◽  
Indirect Evidence ◽  
Magnetic Coupling ◽  
Coupling Constants ◽  
Space Group ◽  
Linear Chains ◽  
Pyridine Complex ◽  
Square Planar ◽  
Neutral Ligands

Crystals of Mn(CH3CONH2)2(HPhPO2)2 are monoclinic, a = 5.668(2), b = 7.500(2), c = 23.104(2) Å, β = 95.52(2)°, Z = 2, space group P21/c, and those of Mn(HPhPO2H)2(HPhPO2)2 are monoclinic, a = 23.281(1), b = 5.508(2), c = 20.5489(6) Å, β = 90.424(4)°, Z = 4, space group C2/c. The structures were solved by heavy-atom methods and were refined by full-matrix least-squares procedures to R = 0.028 and 0.035 for 2081 and 2117 reflections with I ≥ 3σ(I), respectively. Both compounds have structures consisting of polymeric chains propagating along the crystallographic b axis; two phosphinate ligands bridge adjacent manganese atoms forming square planar MO4 units, and six coordination about the metal is achieved by axially O-bonded neutral ligands. Indirect evidence supports similar structures for the other complexes studied here. The complexes are antiferromagnetic and the magnetic susceptibilities have been analyzed according to two Heisenberg models for linear chains. The exchange coupling constants range from −0.30 cm−1 for the acetamide complex to −0.06 cm−1 for the pyridine complex. Magnetostructural correlations involving these complexes and the previously studied Mn(HCONH2)2(HPhPO2)2, reveal that the magnitude of the magnetic coupling is enhanced by symmetrically bridging O—P—O units and short Mn–O–P–O–Mn pathways for exchange. Keywords: polymeric manganese monophenylphosphinates, crystal structures, magnetic properties.

scholarly journals Spin-polarised Electron Studies of Low-dimensional Magnetic Systems

1999 ◽  
Vol 52 (3) ◽  
pp. 579 ◽  
Author(s):  
Markus Donath
Keyword(s):  
Magnetic Properties ◽  
Local Density ◽  
Magnetic Coupling ◽  
Magnetic Sensors ◽  
Magnetic Phase Transitions ◽  
Magnetic Systems ◽  
Combined Use ◽  
Component Systems ◽  
Low Dimensional ◽  
Coupling Phenomena

Spin-polarised electrons provide unique experimental access to magnetic properties of surfaces and layered structures. The combined use of different techniques allows us to develop a microscopic picture of the physics underlying the macroscopic magnetic properties, e.g. magnetic phase transitions, magnetic coupling phenomena, exceptional surface magnetic properties. In this paper, two techniques are described together with the kind of questions addressed by them. Spin-resolved appearance potential spectroscopy gives local magnetic information about multi-component systems by probing the spin-dependent local density of unoccupied states. Spin-resolved inverse photo-emission measures specific electron states above the Fermi level. In particular, two-dimensional states serve as magnetic sensors at surfaces. Examples from surfaces as well as thin-film structures of band and local-moment ferromagnets are presented.

Magnetic coupling in discrete cyano-bridged MnIII-FeIII motifs: Synthesis, crystal structure, magnetic properties and theoretical study

2010 ◽  
Vol 39 (20) ◽  
pp. 5028 ◽  
Author(s):  
Diana Visinescu ◽  
Luminita Marilena Toma ◽  
Joan Cano ◽  
Oscar Fabelo ◽  
Catalina Ruiz-Pérez ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Theoretical Study ◽  
Magnetic Coupling
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