Neutron-scattering study of the magnetic structure of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">DyFe</mml:mi></mml:mrow><mml:mrow><mml:mn>4</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Al</mml:mi></mml:mrow><mml:mrow><mml:mn>8</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow>

Paixão, J. A.; Silva, M. Ramos; Sørensen, S.Å.; Lebech, B.; Lander, G. H.; Brown, P. J.; Langridge, S.; Talik, E.; Gonçalves, A.P.

doi:10.1103/physrevb.61.6176

Cited by 44 publications

(26 citation statements)

References 15 publications

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“…However, unlike in permanent magnets, the virgin magnetization curve falls mainly outside the hysteresis loop 4 in the present material. A similar behavior, although much less pronounced, has been observed recently in a DyFe 4 Al 8 single crystal [5].…”

Section: Introductionsupporting

confidence: 85%

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Extraordinary magnetization behavior of single crystallineTbFe4.4Al7.6

et al. 2001

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We report the observation of a field-induced transformation from the easy-plane antiferromagnetic structure to the easy-axis ferrimagnetic structure in a single crystal of TbFe 4.4 Al 7.6 (tetragonal ThMn 12 structure) at 5 K. Such a field-induced, irreversible transition has been identified for the first time. This transition is accompanied by a giant orthorhombic distortion: ε aa = -ε bb ≈ 3.5×10 -4 that is associated with a magnetic hardness (µ 0 H C ≈ 3 T) that is unprecedented in this category of materials.

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Section: Introductionsupporting

confidence: 85%

“…This can conveniently be described by a single-ion magnetoelastic Hamiltonian which can be considered as the strain derivative of the crystalfield Hamiltonian for the present symmetry. The main term in the latter Hamiltonian takes the form [5] …”

Section: Introductionmentioning

confidence: 99%

Extraordinary magnetization behavior of single crystallineTbFe4.4Al7.6

et al. 2001

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“…For example in Dy148 at ∼50 K the magnetic dc susceptibility rises faster than expected for Curie-Weiss behavior, but there are no sharp features. 8 Furthermore, the rare earth moments were found to follow the Fe-moment modulation. 8,10 This seems to imply that the Fe−R moment interaction is stronger than the R−R moment interaction.…”

Section: Introductionmentioning

confidence: 98%

“…Consequently, numerous studies have been performed on RFe 4 Al 8 (R148) over the last 30 years and interest in these compounds has remained high. 2,3,4,5,6,7,8,9,10,11 Neutron scattering studies performed on R148 with various R indicate that Fe moments, between which the coupling is strongest, order between 100 and 200 K, generally in cycloidal structures with propagation vectors parallel to [110] and moments confined to the a−b plane. 8,9,10,11 For magnetic rare earths R, ordering of the R moments, with much weaker coupling and at much lower temperature T , has been reported.…”

Section: Introductionmentioning

confidence: 99%

Distinct order of Gd4fand Fe3dmoments coexisting inGdFe
Angst
¹
,
Kreyßig
²
,
Janssen
³

et al. 2005
Phys. Rev. B
9
0
2
0
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Single crystals of flux-grown tetragonal GdFe4Al8 were characterized by thermodynamic, transport, and x-ray resonant magnetic scattering measurements. In addition to antiferromagnetic order at TN ≈ 155 K, two low-temperature transitions at T1 ≈ 21 K and T2 ≈ 27 K were identified. The Fe moments order at TN with an incommensurate propagation vector (τ, τ, 0) with τ varying between 0.06 and 0.14 as a function of temperature, and maintain this order over the entire T < TN range. The Gd 4f moments order below T2 with a ferromagnetic component mainly out of plane. Below T1, the ferromagnetic components are confined to the crystallographic plane. Remarkably, at low temperatures the Fe moments maintain the same modulation as at high temperatures, but the Gd 4f moments apparently do not follow this modulation. The magnetic phase diagrams for fields applied in [110] and [001] direction are presented and possible magnetic structures are discussed.

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“…Recently, a considerable attention [5][6][7][8][9][10] has been paid to the rare earth compounds RFe 4 Al 8 , which have the same structure and exhibit interesting magnetic properties. Neutron diffraction [7,9], Mö ssbauer effect [12,13] and magnetic [5,11] measurements have confirmed a complex antiferromagnetic (AF) ordering. Especially CeFe 4 Al 8 and ScFe 4 Al 8 compounds exhibit a long-range magnetic ordering at low temperatures due to the presence of magnetic moments on the iron sublattice [7,10].…”

Section: Introductionmentioning

confidence: 99%