scholarly journals Strain-induced switching between noncollinear and collinear spin configuration in magnetic Mn5Ge3 films

2021 ◽  
Vol 104 (6) ◽  
Author(s):  
Yufang Xie ◽  
Ye Yuan ◽  
Magdalena Birowska ◽  
Chenhui Zhang ◽  
Lei Cao ◽  
...  
Keyword(s):  
Spin Configuration

Effect of change in number of conduction electrons on the spin configuration in transition metal oxides

2008 ◽  
Vol 40 (6-7) ◽  
pp. 1078-1081 ◽  
Author(s):  
Emi Minamitani ◽  
Robert Roleda ◽  
Wilson Agerico Diño ◽  
Tomoya Kishi ◽  
Hiroshi Nakanishi ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Oxides ◽  
Transition Metal Oxides ◽  
Spin Configuration ◽  
Conduction Electrons

Darstellung und 51V-NMR-spektroskopische Untersuchungen von η5-Cyclopentadienyl-tert-butylimidovanadium(III)-Komplexen mit σ-Donator, π-Akzeptor-Liganden / Synthesis and 51V NMR Spectroscopic Studies of η5 -Cyclopentadienyl-tert-butylimidovanadium( III) Complexes with σ -Donor, π -Acceptor Ligands

2003 ◽  
Vol 58 (10) ◽  
pp. 975-989 ◽  
Author(s):  
Martin Billen ◽  
Gabriele Hornung ◽  
Fritz Preuss
Keyword(s):  
Carbon Monoxide ◽  
Carbon Disulfide ◽  
Spectroscopic Studies ◽  
Reductive Dehalogenation ◽  
Spectroscopic Methods ◽  
Spin Configuration ◽  
51V Nmr

The imidovanadium(III) complexes [tBuN=VCp(PR3)2], [tBuN=VCp{P(OR)3}2] and [tBuN= VCp(CO)2] have been prepared starting from tBuN=VCpCl2 by reductive dehalogenation with magnesium. The reaction of [tBuN=VCp(PMe3)2] (2a) with carbon monoxide, alkynes, alkenes, tert-butylphosphaalkyne, nitriles, ketones and carbon disulfide furnished the complexes [tBuN=VCp(PMe3) (L)], while the vanadium(V) compound tBuN=VCp(O2C2Ph2) is formed with benzil. All vanadium(III) complexes obtained are diamagnetic (d2, low-spin configuration) and have been characterized by spectroscopic methods (MS; 1H, 13C, 31P, 51V NMR).

scholarly journals Origin of the Low Magnetic Moment in Fe2AlTi: An Ab Initio Study

Materials ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 1732 ◽  
Author(s):  
Martin Friák ◽  
Anton Slávik ◽  
Ivana Miháliková ◽  
David Holec ◽  
Monika Všianská ◽  
...  
Keyword(s):  
Ab Initio ◽  
Magnetic Moment ◽  
Energy Surface ◽  
Magnetic Moments ◽  
Local Magnetic Moment ◽  
Spin Configuration ◽  
Spin Effects ◽  
Order Of Magnitude ◽  
Huge Impact ◽  
Insight Into

The intermetallic compound Fe 2 AlTi (alternatively Fe 2 TiAl) is an important phase in the ternary Fe-Al-Ti phase diagram. Previous theoretical studies showed a large discrepancy of approximately an order of magnitude between the ab initio computed magnetic moments and the experimentally measured ones. To unravel the source of this discrepancy, we analyze how various mechanisms present in realistic materials such as residual strain effects or deviations from stoichiometry affect magnetism. Since in spin-unconstrained calculations the system always evolves to the spin configuration which represents a local or global minimum in the total energy surface, finite temperature spin effects are not well described. We therefore turn the investigation around and use constrained spin calculations, fixing the global magnetic moment. This approach provides direct insight into local and global energy minima (reflecting metastable and stable spin phases) as well as the curvature of the energy surface, which correlates with the magnetic entropy and thus the magnetic configuration space accessible at finite temperatures. Based on this approach, we show that deviations from stoichiometry have a huge impact on the local magnetic moment and can explain the experimentally observed low magnetic moments.

scholarly journals Low-temperature antiferromagnetism of Ising model with competing interactions

2021 ◽  
pp. 64-71
Author(s):  
Kirill Tsiberkin ◽  
Keyword(s):  
Ising Model ◽  
Low Temperature ◽  
Temperature Shift ◽  
Second Order ◽  
Square Lattice ◽  
Antiferromagnetic Coupling ◽  
Competing Interactions ◽  
Saturation State ◽  
Spin Configuration ◽  
Competing Interaction

The paper presents a numerical analysis of equilibrium state and spin configuration of square lattice Ising model with competing interaction. The most detailed description is given for case of ferromagnetic interaction of the first-order neighbours and antiferromagnetic coupling of the second-order neighbours. The numerical method is based on Metropolis algorithm. It uses 128×128 lattice with periodic boundary conditions. At first, the simulation results show that the system is in saturation state at low temperatures, and it turns into paramagnetic state at the Curie point. The competing second-order interaction makes possible the domain structure realization. This state is metastable, because its energy is higher than saturation energy. The domains are small at low temperature, and their size increases when temperature is growing until the single domain occupies the whole simulation area. In addition, the antiferromagnetic coupling of the second-order neighbours reduces the Curie temperature of the system. If it is large enough, the lattice has no saturation state. It turns directly from the domain state into paramagnetic phase. There are no extra phases when the system is antiferromagnetic in main order, and only the Neel temperature shift realizes here.

scholarly journals All-optical study of tunable ultrafast spin dynamics in [Co/Pd]/NiFe systems: the role of spin-twist structure on Gilbert damping

RSC Advances ◽  
2016 ◽  
Vol 6 (83) ◽  
pp. 80168-80173 ◽  
Author(s):  
Chandrima Banerjee ◽  
Semanti Pal ◽  
Martina Ahlberg ◽  
T. N. Anh Nguyen ◽  
Johan Åkerman ◽  
...  
Keyword(s):  
Spin Dynamics ◽  
Optical Study ◽  
Gilbert Damping ◽  
Spin Configuration ◽  
Exchange Spring ◽  
Static Spin ◽  
All Optical ◽  
Magnetization Precession ◽  
Twist Structure

The competing magnetic anisotropies and the interfacial properties are found to control the static spin configuration and ultrafast demagnetization, magnetization precession and damping in [Co/Pd]/NiFe(t) exchange spring samples.

Triangular spin configuration and weak ferromagnetism of Mn3Ge

1983 ◽  
Vol 31-34 ◽  
pp. 629-630 ◽  
Author(s):  
S. Tomiyoshi ◽  
Y. Yamaguchi ◽  
T. Nagamiya
Keyword(s):  
Weak Ferromagnetism ◽  
Spin Configuration

scholarly journals Spin Configuration in the1/3Magnetization Plateau of Azurite Determined by NMR

2009 ◽  
Vol 102 (12) ◽  
Author(s):  
F. Aimo ◽  
S. Krämer ◽  
M. Klanjšek ◽  
M. Horvatić ◽  
C. Berthier ◽  
...  
Keyword(s):  
Spin Configuration
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