scholarly journals Magnetic exchange interactions inBaMn2As2: A case study of theJ1-J2-JcHeisenberg model

2011 ◽  
Vol 84 (9) ◽  
Author(s):  
D. C. Johnston ◽  
R. J. McQueeney ◽  
B. Lake ◽  
A. Honecker ◽  
M. E. Zhitomirsky ◽  
...  
Keyword(s):  
Exchange Interactions ◽  
Magnetic Exchange

A new 1-1-4 pattern of magnetic exchange interactions in a cubane core tetranuclear copper (II) complex

Polyhedron ◽  
2021 ◽  
Vol 199 ◽  
pp. 115088
Author(s):  
Azadeh Mehrani ◽  
Maurice G. Sorolla ◽  
Tatyana Makarenko ◽  
Allan J. Jacobson
Keyword(s):  
Exchange Interactions ◽  
Magnetic Exchange

scholarly journals Isotropic Nature of the Metallic Kagome Ferromagnet Fe3Sn2 at High Temperatures

Crystals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 307
Author(s):  
Rebecca L. Dally ◽  
Daniel Phelan ◽  
Nicholas Bishop ◽  
Nirmal J. Ghimire ◽  
Jeffrey W. Lynn
Keyword(s):  
Elevated Temperatures ◽  
Magnetocrystalline Anisotropy ◽  
Inelastic Neutron Scattering ◽  
Exchange Interactions ◽  
Inelastic Neutron ◽  
Temperature Threshold ◽  
Magnetic Exchange ◽  
Spatial Anisotropy ◽  
Isotropic Exchange ◽  
State Spin

Anisotropy and competing exchange interactions have emerged as two central ingredients needed for centrosymmetric materials to exhibit topological spin textures. Fe3Sn2 is thought to have these ingredients as well, as it has recently been discovered to host room temperature skyrmionic bubbles with an accompanying topological Hall effect. We present small-angle inelastic neutron scattering measurements that unambiguously show that Fe3Sn2 is an isotropic ferromagnet below TC≈660 K to at least 480 K—the lower temperature threshold of our experimental configuration. Fe3Sn2 is known to have competing magnetic exchange interactions, correlated electron behavior, weak magnetocrystalline anisotropy, and lattice (spatial) anisotropy; all of these features are thought to play a role in stabilizing skyrmions in centrosymmetric systems. Our results reveal that at the elevated temperatures measured, there is an absence of significant magnetocrystalline anisotropy and that the system behaves as a nearly ideal isotropic exchange interaction ferromagnet, with a spin stiffness D(T=480 K)=168 meV Å2, which extrapolates to a ground state spin stiffness D(T=0 K)=231 meV Å2.

scholarly journals Exploiting host–guest chemistry to manipulate magnetic interactions in metallosupramolecular M4L6 tetrahedral cages

2021 ◽  
Vol 12 (14) ◽  
pp. 5134-5142 ◽  
Author(s):  
Aaron J. Scott ◽  
Julia Vallejo ◽  
Arup Sarkar ◽  
Lucy Smythe ◽  
E. Regincós Martí ◽  
...  
Keyword(s):  
Exchange Interactions ◽  
Magnetic Interactions ◽  
Magnetic Exchange ◽  
Guest Chemistry

The tetrahedral [NiII4L6]8+ cage can reversibly bind paramagnetic MX41/2− guests, inducing magnetic exchange interactions between host and guest.

scholarly journals A Framework for Identifying Sequences of Interactions That Cause Usability Problems in Collaborative Systems

Electronics ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 388
Author(s):  
Santos Bringas ◽  
Rafael Duque ◽  
Alicia Nieto-Reyes ◽  
Cristina Tîrnăucă ◽  
José Luis Montaña
Keyword(s):  
Exchange Interactions ◽  
Smartphone Application ◽  
Collaborative Systems ◽  
Software Support ◽  
Shared Spaces ◽  
Usability Problems ◽  
Sport Betting ◽  
Awareness Information ◽  
Collaborative Activities

Collaborative systems support shared spaces, where groups of users exchange interactions. In order to ensure the usability of these systems, an intuitive interactions’ organization and that each user has awareness information to know the activity of others are necessary. Usability laboratories allow evaluators to verify these requirements. However, laboratory usability evaluations can be problematic for reproducing mobile and ubiquitous contexts, as they restrict the place and time in which the user interacts with the system. This paper presents a framework for building software support that it collects human–machine interactions in mobile and ubiquitous contexts and outputs an assessment of the system’s usability. This framework is constructed through learning that is based on neural networks, identifying sequences of interactions related to usability problems when users carry out collaborative activities. The paper includes a case study that puts the framework into action during the development process of a smartphone application that supports collaborative sport betting.

scholarly journals Magnetic exchange interactions in the van der Waals layered antiferromagnet MnPSe3

2021 ◽  
Vol 103 (2) ◽  
Author(s):  
S. Calder ◽  
A. V. Haglund ◽  
A. I. Kolesnikov ◽  
D. Mandrus
Keyword(s):  
Van Der Waals ◽  
Exchange Interactions ◽  
Magnetic Exchange

scholarly journals Analysis of the Magnetic Exchange Interactions in Yttrium(III) Complexes Containing Nitronyl Nitroxide Radicals

2017 ◽  
Vol 56 (12) ◽  
pp. 6788-6801 ◽  
Author(s):  
Julie Jung ◽  
Marin Puget ◽  
Olivier Cador ◽  
Kevin Bernot ◽  
Carmen J. Calzado ◽  
...  
Keyword(s):  
Exchange Interactions ◽  
Nitronyl Nitroxide ◽  
Nitroxide Radicals ◽  
Magnetic Exchange

Magnetic exchange interactions in transition metal dimers. VI. Tetracyanonickelate(II) ion as a bridging group

1975 ◽  
Vol 14 (10) ◽  
pp. 2577-2578 ◽  
Author(s):  
Kent R. Mann ◽  
D. Michael. Duggan ◽  
David N. Hendrickson
Keyword(s):  
Transition Metal ◽  
Exchange Interactions ◽  
Magnetic Exchange

Magnetic exchange interactions and antiferromagnetism ofATcO3(A=Ca, Sr, Ba) studied from first principles

2012 ◽  
Vol 85 (13) ◽  
Author(s):  
V. S. Borisov ◽  
I. V. Maznichenko ◽  
D. Böttcher ◽  
S. Ostanin ◽  
A. Ernst ◽  
...  
Keyword(s):  
First Principles ◽  
Exchange Interactions ◽  
Magnetic Exchange
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