On the spin reorientation in TbFe11Ti and related compounds

Andreev, A.V.; Kudrevatykh, N. V.; Razgonyaev, S.M.; Tarasov, E. N.

doi:10.1016/0921-4526(93)90128-s

Cited by 26 publications

(20 citation statements)

References 9 publications

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“…V. Andreev and S. M. Zadvorkin (a) Temperature dependence of the orthorhombic distortion e and magnetostriction constanţ g ,2 for TbFe 11 Ti: (d ), data on e obtained from splitting of the b 800 re¯ection; (s ), data obtained from its broadening; (± ± ± ), guide for eye for e ( T ) ; (Ð Ð ), descriptions of the¸g ,2 ( T ) dependence on the basis of single-ion model, by the third power of the Tb-sublattice magnetic moment and by the function used by Kazakov et al (1995) to describe the temperature dependence of¸a ,2 dependence was determined as the di erence between ¹ m ( T ) of TbFe 11 Ti and LuFe 11 Ti. This value for the spin reorientation temperature (obtained without a magnetic ® eld) is in good agreement with T s = 250 K determined by Andreev et al (1993) from ac susceptibility measurements on a multidomain sample. Below 200 K, where e =¸g ,2 was assumed, e ( T) decreases somewhat faster than ¹ 3 Tb ( T ) but similar to¸a ,2 2 as it well described by L 6 2 ( T) .…”

Section: Thermal Expansion and Spontaneous Magnetostriction In Rfe11 Tisupporting

confidence: 86%

“…Studies of magnetic phase transitions, magnetic anisotropy and crystal-® eld interactions in the RFe 11 Ti compounds have been summarized by Kou et al (1993). Although the growth of single crystals of RT 12-x M x is rather di cult task, the magnetic properties of many RFe 11 Ti were studied on single-crystal samples: for R = Y ), Sm (Ohashi et al 1988, Kaneko et al 1989), Gd ( Razgonyaev 1991, Tb (Andreev et al 1993, Kazakov et al 1995, Andreev and Zadvorkin 1996, Dy , Andreev et al 1990, Garcõ Â a et al 1993, Kuz'min et al 1996, Ho ), Er, Lu . Although the growth of single crystals of RT 12-x M x is rather di cult task, the magnetic properties of many RFe 11 Ti were studied on single-crystal samples: for R = Y ), Sm (Ohashi et al 1988, Kaneko et al 1989), Gd ( Razgonyaev 1991, Tb (Andreev et al 1993, Kazakov et al 1995, Andreev and Zadvorkin 1996, Dy , Andreev et al 1990, Garcõ Â a et al 1993, Kuz'min et al 1996, Ho ), Er, Lu .…”

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confidence: 99%

“…Magnetization data, used for the analysis of thermal expansion anomalies, were taken from Kudrevatykh et al (1990), Razgonyaev (1991 and Andreev et al (1993). The single crystals studied in these investigations and in the present paper were prepared from the same ingots which ensures identical sample composition in both studies.…”

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confidence: 99%

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Thermal expansion anomalies and spontaneous magnetostriction in RFe11Ti single crystals

Andreev¹

1998

Philosophical Magazine B

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The thermal expansion of single crystals of the tetragonal rare-earth intermetallics RFe 11 Ti ( R = Y, Gd, Tb, Dy or Ho) has been studied by X-ray dilatometry in the range 5± 800 K. The spontaneous volume magnetostriction x s at 5 K amounts to about 1´10 -2 , almost independent of the rare-earth component. At elevated temperatures, x s scales well with the square of the Fe magnetic moment, re¯ecting the dominant contribution of the Fe± Fe exchange interaction in the magnetostriction phenomena in these intermetallics. The magnetostriction is anisotropic; the basal-plane strain¸a far exceeds the uniaxial strain¸c. In compounds with R = Dy or Tb, a transition from a multiaxial to a uniaxial anisotropy with increasing temperature is accompanied by an additional volume e ect of about 1´10 -3 . Magnetostrictive distortion (up to 1´10 -3 at 5 K) was observed at low temperatures in the basal plane of TbFe 11 Ti.

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Section: Thermal Expansion and Spontaneous Magnetostriction In Rfe11 Tisupporting

confidence: 86%

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confidence: 99%

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Thermal expansion anomalies and spontaneous magnetostriction in RFe11Ti single crystals

Andreev¹

1998

Philosophical Magazine B

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“…Such a dip was also observed in Nd 2 Fe 14 B under similar conditions 4 as well as in TbFe 11 Ti. 28 It is likely to constitute a characteristic attendant feature of this type of spin reorientation transitions. It should be noted that the temperature dependence of the anisotropy constants does not provide a simple explanation of this effect.…”

Section: Discussionmentioning

confidence: 99%

ac susceptibility of aDyFe11Ti single crystal

et al. 1996

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A study of the ac initial magnetic susceptibility of a roughly spherical single crystal of DyFe 11 Ti is reported. Both the real and imaginary parts of the complex susceptibility have been measured in absolute units along the principal crystallographic directions, the results being practically identical for ͓100͔ and ͓110͔. The underlying mechanisms-coherent magnetization rotation and domain-wall motion-are considered. It is demonstrated that the thermally activated domain-wall displacements provide the clue to understanding the main features of the temperature dependence of both the real and imaginary parts of the observed susceptibility.

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“…1 The competing anisotropy contributions from the two sublattices can therefore lead to spin reorientation transitions. However, there exist some inconsistencies in the reported magnetic transitions for Dy(Fe,T) 12 compounds such as spin reorientation and first-order magnetization transition 4,5 -Hu et al 4 suggested that a first-order spin reorientation takes place at T sr1 with a second-order spin reorientation occurring at T sr2 , while Andreev et al 5 reported two consecutive second-order spin reorientations at T sr1 and T sr2 .…”

Section: Introductionmentioning

confidence: 99%

Anomalies in magnetoelastic properties of DyFe11.2Nb0.8 compound

Wang

Din

Kennedy

et al. 2015

Journal of Applied Physics

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Anomalies in magnetoelastic properties of DyFe11.2Nb0.8 compound AbstractThe structural and magnetic properties of DyFe 11.2 Nb 0.8 compound have been investigated by high intensity, high resolution synchrotron x-ray diffraction, ac magnetic susceptibility, and dc magnetization measurements as well as Mössbauer spectroscopy (5-300 K). The easy magnetization direction at room temperature is along the c-axis. With decreasing temperature, the magnetocrystalline anisotropy changes from easy-axis to easycone at T sr2 (∼202 K), then to easy plane at T sr1 (∼94 K). The thermal expansion coefficient obtained from the synchrotron x-ray study exhibits clear anomalies around both of the spin reorientation transition temperatures. The 57 Fe hyperfine interaction parameters and magnetic moments values have been determined for the 8i, 8j, and 8f sites from the Mössbauer spectra. The structural and magnetic properties of DyFe 11.2 Nb 0.8 compound have been investigated by high intensity, high resolution synchrotron x-ray diffraction, ac magnetic susceptibility, and dc magnetization measurements as well as M€ ossbauer spectroscopy (5-300 K). The easy magnetization direction at room temperature is along the c-axis. With decreasing temperature, the magnetocrystalline anisotropy changes from easy-axis to easy-cone at T sr2 ($202 K), then to easy plane at T sr1 ($94 K). The thermal expansion coefficient obtained from the synchrotron x-ray study exhibits clear anomalies around both of the spin reorientation transition temperatures. The 57 Fe hyperfine interaction parameters and magnetic moments values have been determined for the 8i, 8j, and 8f sites from the M€ ossbauer spectra. V C 2015 AIP Publishing LLC.

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On the spin reorientation in TbFe11Ti and related compounds

Cited by 26 publications

References 9 publications

Thermal expansion anomalies and spontaneous magnetostriction in RFe11Ti single crystals

Thermal expansion anomalies and spontaneous magnetostriction in RFe11Ti single crystals

ac susceptibility of aDyFe11Ti single crystal

Anomalies in magnetoelastic properties of DyFe11.2Nb0.8 compound

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