Paramagnetic resonance in binary Eu(II) and Gd(III) compounds

Busch, G.; Natterer, B.; Neukomm, H. R.

doi:10.1016/0031-9163(66)90858-4

Cited by 31 publications

(3 citation statements)

References 12 publications

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“…3a. The EPR spectral shape of EuO nanocrystals were similar to that of reported EuO (g = 2.01) [12]. On the other hand, experimental p value introduced g constant (2.003) was agreeable with theoretical p for the magnetic measurements.…”

Section: Epr Measurementssupporting

confidence: 85%

“…The EPR signal of the EuO nanocrystals changes under 130 K. It seems that the alteration is due to the change of the magnetic state of the Eu(II) nanocrystals [12]. We observed that the blocking temperature of EuO nanocrystal with polyurea was around 150 K. The EPR signal under 130 K might be affected by the magnetic state of EuO nanocrystals.…”

Section: Epr Measurementsmentioning

confidence: 84%

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EPR spectra analysis of photo-magnetic properties of EuO nanocrystals

Hasegawa

Wada

Yanagida

2006

Journal of Alloys and Compounds

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Section: Epr Measurementssupporting

confidence: 85%

Section: Epr Measurementsmentioning

confidence: 84%

EPR spectra analysis of photo-magnetic properties of EuO nanocrystals

Hasegawa

Wada

Yanagida

2006

Journal of Alloys and Compounds

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“…We also consider the magnetic properties. The heavier members of the family belonging to GdN and EuO become antiferromagnetic (AFM), including GdP, GdAs, GdSb, and GdBi [17,22,[26][27][28] as well as EuSe and EuTe [4,11,[29][30][31][32][33]. EuS remains ferromagnetic with a lower T c and a second-neighbour coupling constant (J 2 ) which becomes negative but smaller than the nearest-neighbour coupling constant (J 1 ) [4,34,35].…”

Section: Introductionmentioning

confidence: 99%

Electronic structure and magnetism of europium chalcogenides in comparison with gadolinium nitride

Larson¹,

Lambrecht²

2006

J. Phys.: Condens. Matter

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Electronic structure calculations were carried out for the europium chalcogenides (EuO, EuS, EuSe, EuTe) using the ‘LSDA+U’ approach, in which orbital-dependent Coulomb and exchange effects are added to the local spin density approximation (LSDA) for the f electrons. The usual LSDA gap underestimate is also corrected by adding Ud terms, which shift up the empty d states. While both GdN and EuO are found to be magnetic semiconductors, there are significant differences in the electronic structure, in particular in the location of the filled f bands. The origin of these differences and their effect on various other aspects of the band structure are discussed. The exchange coupling between magnetic moments is studied by mapping the energy differences of different magnetic configurations to a Heisenberg Hamiltonian with first- and second-nearest-neighbour interactions. The exchange interactions are in fair agreement with experimental values and explain the trends in magnetic properties.

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Local Environments Around Eu³⁺ and Eu²⁺ Ions in Dual Light‐Emitting BaSnO₃:Eu Nanomaterials

et al. 2012

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The change in the environment around Eu3+ and Eu2+ species as a function of their concentration in BaSnO3:Eu nanomaterials has been investigated by low‐temperature (77 K) luminescence and electron paramagnetic resonance (EPR) spectroscopy. These materials show dual emission from the europium ions upon single‐wavelength excitation. Europium ions (Eu3+ and Eu2+) occupy the centrosymmetric Ba2+ sites up to 4 atom‐% in BaSnO3, beyond which it forms a separate europium oxide phase with both Eu2+ and Eu3+ ions. There is energy transfer from the BaSnO3 host to the Eu2+ ions in the samples. Upon single‐wavelength UV excitation (280 nm) of the BaSnO3:Eu nanomaterials, strong emissions at 430, 480, 590 and 612 nm, characteristic of exciton recombination in the host BaSnO3 (430 nm), the 4f65d1(T2g)→4f 7(8S7/2) transition of Eu2+ (480 nm) and intra‐4f transitions of Eu3+ (590 and 612 nm) have been observed. For samples that contain more than 4 atom‐% europium ions based on steady‐state luminescence measurements and lifetime values that correspond to the 5D0 level of Eu3+ ions, it is inferred that there are mainly three types of Eu3+ ions: the first at Ba2+ sites with perfect dodecahedral geometry in the bulk of the nanomaterials, the second at Ba2+ sites at the surface of the nanomaterials and the third type as a separate europium oxide phase. Similarly, EPR specroscopy confirms the presence of three types of environments for the Eu2+ species.

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Paramagnetic resonance in binary Eu(II) and Gd(III) compounds

Cited by 31 publications

References 12 publications

EPR spectra analysis of photo-magnetic properties of EuO nanocrystals

EPR spectra analysis of photo-magnetic properties of EuO nanocrystals

Electronic structure and magnetism of europium chalcogenides in comparison with gadolinium nitride

Local Environments Around Eu³⁺ and Eu²⁺ Ions in Dual Light‐Emitting BaSnO₃:Eu Nanomaterials

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Paramagnetic resonance in binary Eu(II) and Gd(III) compounds

Cited by 31 publications

References 12 publications

EPR spectra analysis of photo-magnetic properties of EuO nanocrystals

EPR spectra analysis of photo-magnetic properties of EuO nanocrystals

Electronic structure and magnetism of europium chalcogenides in comparison with gadolinium nitride

Local Environments Around Eu3+ and Eu2+ Ions in Dual Light‐Emitting BaSnO3:Eu Nanomaterials

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Product

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Local Environments Around Eu³⁺ and Eu²⁺ Ions in Dual Light‐Emitting BaSnO₃:Eu Nanomaterials