Crystal-field anisotropy of Tb, Ho and Tm in gadolinium

Carboni, C.; McCausland, M A H; Bunbury, D St P; Reid, B.L.; Lataifeh, Mahdi S.; Abell, J.S.

doi:10.1016/0304-8853(92)91432-s

Cited by 6 publications

(11 citation statements)

References 7 publications

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“…In order to remove any damage to the surface during the spark erosion process, the needles were slightly etched in dilute nitric acid. These samples were identical to ones studied in [3] by high frequency NMR.…”

Section: Methodsmentioning

confidence: 91%

“…To our knowledge only the following studies of the TbGd system exist: (i) the torque magnetometer measurements E-mail address: trhlik@mbox.troja.mff.cuni.cz. 0953-8984/98/337467+08$19.50 c 1998 IOP Publishing Ltd of Gd + 1.7 at.% Tb [1], where the behaviour of the Tb magnetic moment sublattice was derived by comparison with the measurement of pure Gd, (ii) the 155 Gd Mössbauer study [2], which revealed the properties of the Gd sublattice influenced by Tb, and (iii) the 159 Tb nuclear magnetic resonance (NMR) study [3] giving the behaviour of the Tb sublattice based on assumptions of hyperfine interaction properties. One of the methods, which can give direct information of the magnetic behaviour of individual magnetic sublattices, is low-temperature nuclear orientation (NO).…”

Section: Introductionmentioning

confidence: 99%

“…In this paper we present our new NO study of 160 Tb in the Gd + 1 at.% Tb single crystal prepared by a different method than we used in [5]. We have used the same samples, which had already been studied by NMR (partly published in [3]). Moreover, a combination of the NO and NMR results allows us to derive directly the Tb magnetic moment direction for different magnitudes and orientations of B ext .…”

Section: Introductionmentioning

confidence: 99%

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Tb magnetic moment behaviour in a Gd single crystal: nuclear orientation study

Trhlík

Carboni

Moor

et al. 1998

J. Phys.: Condens. Matter

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Low-temperature nuclear orientation has been used to study the behaviour of the Tb magnetic moment in a Gd + 1 at.% Tb single crystal. The -ray anisotropy of several lines was monitored in the temperature range of 5-50 mK and in the external magnetic field range of 0-8.5 T. The field was applied either along the a- or along the c-axis of the Gd single crystal. In the case of parallel to the a-axis the Tb magnetic moment was found to be almost aligned along even at very low fields, as expected because the hexagonal basal plane is an easy magnetization plane for the Tb ion in terbium metal. On the other hand, when is along the c-axis the Tb magnetic moment rotates very slowly towards the c-axis. Even at the Tb magnetic moment is not along the direction of . This is in contrast to the fast saturation of the gadolinium ions in pure Gd. Apparently, the Tb-Gd exchange interaction is in competition with the crystal field acting on the Tb ion in a hexagonal lattice, our data indicates that at along the c-axis the angle between the Tb magnetic moment and the applied field is of the order of .

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Section: Methodsmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Tb magnetic moment behaviour in a Gd single crystal: nuclear orientation study

Trhlík

Carboni

Moor

et al. 1998

J. Phys.: Condens. Matter

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“…They also serve as an excellent example for the theory of ferromagnetic and ferrimagnetic alloys. NMR study of the magnetic anisotropy and field dependence of the hyperfine interactions of 165 Ho in ferromagnetically ordered single crystals of holmium with gadolinium have already been studied using NMR [1,2]. The results reveal that the crystal field quenching of the holmium magnetic moment is negligible.…”

Section: Introductionmentioning

confidence: 94%

Structural and magnetic studies of 1% Ho:Gd _0.99−x Lu _x alloys

Al‐Omari¹,

Rais

Lataifeh

et al. 2004

phys. stat. sol. (c)

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We present a study of the magnetic and structural properties of 1% Ho:Gd 0.99-x Lu x alloys. X-ray diffraction patterns for 1% Ho:Gd 0.99-x Lu x (x = 0.01, 0.39, and 0.59) show a single hexagonal type phase structure and the lattice parameters are found to depend on the Lutetium concentration. Magnetic measurements were made at temperatures between 100 K and 850 K using a vibrating sample magnetometer with a maximum field of 13.5 kOe. All the samples under investigation show a ferromagnetic behavior up to Curie temperature. The Curie temperature (T c ) and the saturation magnetization (M s ) are found to decrease with increasing the Lutetium concentration. The saturation magnetization is found to increase with decreasing the temperature (T) for all samples. The magnetic moment of 1% Ho:Gd 0.98 Lu 0.01 at 0 K was estimated, to be (7.05 ± 0.05) µ B /f.u., by extrapolating the M s versus T 3/2 to T = 0 K. The results clearly indicate the formation of solid solution alloys.

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“…In addition, they serve as an excellent example for the theory of ferromagnetic and ferrimagnetic alloys. NMR study of the magnetic anisotropy and field dependence of the hyperfine interactions of 165 Ho in ferromagnetically ordered single crystals of holmium with gadolinium have already been studied using NMR Spectrometer at liquid helium [1,2]. The results reveal that the crystal field quenching of the holmium magnetic moment is negligible, which is due to the shielding of the (5s 2 , 5p 6 ) outer electrons, and so the crystal field interaction between the surrounding ions plus conduction electrons with anisotropic 4f charge distribution of the Ho ion will decrease.…”

Section: Introductionmentioning

confidence: 99%