Magnetic Coupling of Ni, Cu and Co Bi- and Trilayers Probed by Magnetic Circular X-Ray Dichroism

The radio pulsars in the Galaxy are found predominantly in the disk, with a scale height of several hundred parsecs. After allowing for pulsar velocities, the data are consistent with the hypothesis that single pulsars form from massive stellar progenitors. The number of active single pulsars in the Galaxy is ∼ 1.5 × 105, and their birthrate is 1 per ∼ 60 yrs. There is some evidence that many single pulsars, particularly those with high magnetic fields, are born spinning slowly, with initial periods ∼ 0.5–1s. This could imply an origin through binary “recycling” followed by orbit disruption, or might suggest that the pre-supernova stellar core efficiently loses angular momentum to the envelope through magnetic coupling. The birthrate of binary radio pulsars, particularly of the millisecond variety, seems to be much larger than previous estimates, and might suggest that these systems do not originate in low mass X-ray binary systems.

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ChemInform Abstract: Exchange Interaction in Multinuclear Transition-Metal Complexes. Part 10. Bridging and Twist Angle Dependence of Magnetic Coupling in Doubly Bridged Copper(II) Dimers. X-Ray Structure of Bis(chloro(N-phenyl(2-hydroxybenzylidene)aminat

ChemInform ◽

10.1002/chin.198731047 ◽

1987 ◽

Vol 18 (31) ◽

Author(s):

B. CHIARI ◽

O. PIOVESANA ◽

T. TARANTELLI ◽

P. F. ZANAZZI

Keyword(s):

Transition Metal ◽

Metal Complexes ◽

Exchange Interaction ◽

Transition Metal Complexes ◽

Twist Angle ◽

Magnetic Coupling ◽

Abstract Exchange ◽

X Ray ◽

Angle Dependence

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Ferroelectric and Ferromagnetic Properties of Co-doped BiFeO3 Thin Films

MRS Proceedings ◽

10.1557/proc-1256-n06-47 ◽

2010 ◽

Vol 1256 ◽

Cited By ~ 4

Author(s):

Danilo G Barrionuevo ◽

Surinder P Singh ◽

Ram S Katiyar ◽

Maharaj S. Tomar

Keyword(s):

Thin Films ◽

Magnetic Coupling ◽

Partial Replacement ◽

Material System ◽

X Ray Diffraction ◽

X Ray ◽

Si Substrates ◽

Solution Route ◽

Diffraction Patterns ◽

Novel Devices

AbstractMaterials which possess electrical and magnetic coupling are of great interest for novel devices. Bi(Fe1-xCox)O3 (BFCO) material system was synthesized by solution route for various compositions and thin films were prepared by spin coating on Pt (Pt/Ti/SiO2/Si) substrates. Structural properties of the films were investigated by x-ray diffraction and Raman spectroscopy. X-ray diffraction patterns confirms intense (110) in BiFeO3 and Bi(Fe1-xCox)O3 with rhombohedra distorted perovskite structure without impure phase. Bi(Fe1-xCox)O3 films show week ferroelectric polarization and ferromagnetism at room temperature. Ferroelectric and ferromagnetic coupling could be attributed to the elimination of oxygen vacancies and increased stress in the crystal structure by partial replacement of Fe2+ ion by Co2+ ion.

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Antiferromagnetic coupling of TbPc2 molecules to ultrathin Ni and Co films

Beilstein Journal of Nanotechnology ◽

10.3762/bjnano.4.36 ◽

2013 ◽

Vol 4 ◽

pp. 320-324 ◽

Cited By ~ 32

Author(s):

David Klar ◽

Svetlana Klyatskaya ◽

Andrea Candini ◽

Bernhard Krumme ◽

Kurt Kummer ◽

...

Keyword(s):

Absorption Spectroscopy ◽

Single Molecule ◽

Magnetic Circular Dichroism ◽

Magnetic Coupling ◽

Magnetic Surface ◽

Antiferromagnetic Coupling ◽

Single Molecule Magnets ◽

X Ray ◽

X Ray Absorption

The magnetic and electronic properties of single-molecule magnets are studied by X-ray absorption spectroscopy and X-ray magnetic circular dichroism. We study the magnetic coupling of ultrathin Co and Ni films that are epitaxially grown onto a Cu(100) substrate, to an in situ deposited submonolayer of TbPc2 molecules. Because of the element specificity of the X-ray absorption spectroscopy we are able to individually determine the field dependence of the magnetization of the Tb ions and the Ni or Co film. On both substrates the TbPc2 molecules couple antiferromagnetically to the ferromagnetic films, which is possibly due to a superexchange interaction via the phthalocyanine ligand that contacts the magnetic surface.

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Ferromagnetic Intermolecular Interaction and Crystal Structure of α-Nitronyl Nitroxide

MRS Proceedings ◽

10.1557/proc-173-33 ◽

1989 ◽

Vol 173 ◽

Cited By ~ 3

Author(s):

Kunio Awaga ◽

Tamotsu Inabe ◽

Yusei Maruyama

Keyword(s):

Crystal Structure ◽

Temperature Dependence ◽

Intermolecular Interaction ◽

Magnetic Coupling ◽

Two Dimensional ◽

Nitronyl Nitroxide ◽

Magnetic Susceptibilities ◽

X Ray ◽

Nitronyl Nitroxides ◽

Coulomb Attraction

ABSTRACTThe temperature dependence of the magnetic susceptibilities for several ±-nitronyl nitroxides have been measured. It is found that the intermolecular magnetic coupling in these radical crystals changes from antiferromagnetic to ferromagnetic depending on the substituents at ±-position. X-Ray crystal analysis and MO calculation have been carried out on the ferromagnetic ±-nitronyl nitroxide, 2-(4-nitrophenyl)-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazolyl-1-oxy 3-oxide, revealing a two-dimensional ferromagnetic network linked by the Nδ+...0δ− Coulomb attraction.

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