ac susceptibility of a<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>11</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>Ti single crystal

Kuz’min, M. D.; Garcı́a, L. M.; Artigas, M.; Bartolomé, J.

doi:10.1103/physrevb.54.4093

Cited by 22 publications

(23 citation statements)

References 22 publications

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“…In paramagnetic and ferromagnetic materials above the Curie temperature ac Љ is always positive and close to zero. [18][19][20][21] In ferromagnetic materials, the increase in ac Љ below T C is mainly caused by domain wall motion. 19 When a low ac magnetic field is applied parallel to the EMD, the main contribution to the ac magnetic susceptibility is due to the domain wall movement and energy losses will be encountered and ac Љ shows a nonzero value.…”

Section: Discussionmentioning

confidence: 99%

“…19,20 The sharp increase of the ac Љ peak of ͑Dy 0.5 Er 0.5 ͒Al 2 measured in a 25 Oe ac magnetic field reflects the increased energy absorption by oscillating domain walls excited by a large ac magnetic field. Note that ac Љ has a large positive magnitude along both crystallographic directions.…”

Section: Discussionmentioning

confidence: 99%

“…20,21 Therefore, the interpretation of the ac magnetic susceptibility in ferromagnetic materials is not a simple problem 4,16,17 because it mainly reflects the oscillation of domain walls under the influence of the ac magnetic field and the existence of various additional magnetic phenomena, e.g., the magnetic viscosity and after effect. 24 A comparison of the magnetic susceptibility measured in both the ac and dc magnetic fields shows that the temperature dependence of the ac Ј measured in zero bias dc magnetic field below T C is reflected by the behavior of the coercivity, which supports the conclusion of Kou et al 19 that the real component of the ac magnetic susceptibility is mainly determined by the temperature dependence of the magnetocrystalline anisotropy.…”

Section: Discussionmentioning

confidence: 99%

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Magnetism of (Dy0.5Er0.5)Al2 single crystal in ac and dc magnetic fields

Levin

Gschneidner

Lograsso

et al. 2006

Journal of Applied Physics

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The temperature (4.2-90 K), ac magnetic field (1.25-50 Oe), frequency (5-125 Hz), and bias dc magnetic field (0-10 kOe) dependencies of the real and imaginary components of the ac magnetic susceptibility, and the temperature (4.2-250 K) and dc magnetic field(0.1-50 kOe) dependencies of the dc magnetic susceptibility and magnetization of a(Dy 0.5 Er 0.5 )Al 2 single crystal have been studied. Isothermal magnetization measurement in a dc magnetic field indicates that (Dy 0.5 Er 0.5 )Al 2 orders ferromagnetically at 37 K. The ac and dc magnetic susceptibilities of (Dy 0.5 Er 0.5 )Al 2 exhibit a similar behavior in the paramagnetic region but quite different behaviors in the ferromagnetic state. Both the real and imaginary components of the ac magnetic susceptibility are sensitive to the applied ac magnetic field, the crystallographic direction, and the bias magnetic field, showing that domain wall dynamics mainly account for the response to the ac magnetic field. The contributions to the magnetization process arise from the magnetically ordered Dy and Er sublattices and depend upon the single-ion anisotropy of the Dy and Er ions. KeywordsPhysics and Astronomy, Materials Science and Engineering, dysprosium alloys, erbium alloys, aluminium alloys, ferromagnetic materials, magnetic susceptibility, magnetic domain walls, magnetic anisotropy Disciplines Condensed Matter Physics | Metallurgy CommentsThe following article appeared in Journal of Applied Physics 100 (2006) The temperature ͑4.2-90 K͒, ac magnetic field ͑1.25-50 Oe͒, frequency ͑5 -125 Hz͒, and bias dc magnetic field ͑0-10 kOe͒ dependencies of the real and imaginary components of the ac magnetic susceptibility, and the temperature ͑4.2-250 K͒ and dc magnetic field ͑0.1-50 kOe͒ dependencies of the dc magnetic susceptibility and magnetization of a ͑Dy 0.5 Er 0.5 ͒Al 2 single crystal have been studied. Isothermal magnetization measurement in a dc magnetic field indicates that ͑Dy 0.5 Er 0.5 ͒Al 2 orders ferromagnetically at 37 K. The ac and dc magnetic susceptibilities of ͑Dy 0.5 Er 0.5 ͒Al 2 exhibit a similar behavior in the paramagnetic region but quite different behaviors in the ferromagnetic state. Both the real and imaginary components of the ac magnetic susceptibility are sensitive to the applied ac magnetic field, the crystallographic direction, and the bias magnetic field, showing that domain wall dynamics mainly account for the response to the ac magnetic field. The contributions to the magnetization process arise from the magnetically ordered Dy and Er sublattices and depend upon the single-ion anisotropy of the Dy and Er ions.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Magnetism of (Dy0.5Er0.5)Al2 single crystal in ac and dc magnetic fields

Levin

Gschneidner

Lograsso

et al. 2006

Journal of Applied Physics

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“…[1][2][3][4][5][6]. Since 1990, interstitial atoms such as H, C, and N have been introduced into the R(Fe,T) 12 compounds by gas-solid phase reaction [7,8] and have resulted in a dramatic change in the magnetic properties of 1:12 compounds.…”

Section: Introductionmentioning

confidence: 99%

Investigation of structural stability and site preference of Dy(Fe,T)12 and Dy(Fe,T)12Nx (T=Ti, V, Cr, Nb, Mo)

2005

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“…At present the differences between the information produced by the two techniques employed in this work are not understood, but it is recognized that the Curie temperature determined by the Weiss-Forrer method is highly dependent upon the magnitude of the moment of the second phase subtracted from the measurements. Additionally, the measurement time scales of the two methods are not the The interpretation of ac susceptibility data from magnetic materials is often not straightforward because of their dependence on sample shape, microstructure, domain structure and lattice impurities [15]. As stated previously, however, the spin reorientation temperature is routinely determined as the minimum in the temperature derivative of the in-phase susceptibility.…”

Section: Excessmentioning

confidence: 99%

Extrinsic Curie temperature and spin reorientation changes in Nd{sub 2}Fe{sub 14}B/{alpha}-Fe nanocomposites

Lewis¹,

Panchanathan²

1998

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Abstract:The Curie temperatures and spin reorientation temperatures of a series of four melt-spun nanocomposite materials comprised of Nd2FelB and varying amounts of a-Fe were measured using independent techniques. The phase constitution and grain size was assessed with synchrotron x-ray diffraction; the Curie temperatures were measured by differential thermal analysis (DTA) and & SQUID magnetometry in the temperature range 375 K s T s 800 K, whereas the spin reorientation transition temperature was determined from ac susceptibility measurements taken in the range 10 K s T I 300 K. The Curie temperature increases with increasing excess iron content, resulting in a 18" enhancement over the Curie temperature of pure Nd2Felfi for 27 wt% excess a-Fe. The spin reorientation temperatures are depressed from the singlecrystal value by an average of 10 degrees. Both anomalous effects are attributed to intergranular exchange coupling present in the alloys, although the effects of uncompensated stress between the constituent phases cannot be ruled out. The experimental results suggest that while the Curie temperature of the Nd2FelB phase may be extrinsically enhanced significantly beyond the bulk value, possibly extending the range of applications of this compound, the anisotropy may be simultaneously lowered, impeding the attainment of high coercivities in these alloys.

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ac susceptibility of aDyFe11Ti single crystal

Cited by 22 publications

References 22 publications

Magnetism of (Dy0.5Er0.5)Al2 single crystal in ac and dc magnetic fields

Magnetism of (Dy0.5Er0.5)Al2 single crystal in ac and dc magnetic fields

Investigation of structural stability and site preference of Dy(Fe,T)12 and Dy(Fe,T)12Nx (T=Ti, V, Cr, Nb, Mo)

Extrinsic Curie temperature and spin reorientation changes in Nd{sub 2}Fe{sub 14}B/{alpha}-Fe nanocomposites

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