Magnetic and crystallographic properties of HoCo3B2

Caspi, E. N.; Dubman, M.; Ettedgui, Hanania; Shaked, H.; Short, S.; Jorgensen, J. D.

doi:10.1016/j.physb.2005.01.271

Cited by 12 publications

(9 citation statements)

References 5 publications

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“…The anomaly in the range of T Co ≈ 150 K was also observed in both end compounds TbCo 3 B 2 [3] and YCo 3 B 2 [4], where it was attributed to the paramagnetic-ferromagnetic transition in the Co sublattice. Thus, the present AC susceptibility measurements support our previous suggestion [3,5] that the ferromagnetic ordering of the Co at T Co is independent of Y concentration. This is unlike T Tb , which decreases almost linearly with the increase of Y concentration until it vanishes in the vicinity of x = 0.4 (figures 2 and 3).…”

Section: Results and Analysissupporting

confidence: 92%

“…In general, the magnetic properties of Tb 1−x Y x Co 3 B 2 presented here support our model of the magnetic behavior of the RCo 3 B 2 compounds [3][4][5]. It is shown here that T Tb depends on the dilution of the magnetic R site with a nonmagnetic atom such as Y. T Tb decreases from ∼30 K for x = 0 [3] to ∼14 K for x = 0.25 (figure 3).…”

Section: Discussionsupporting

confidence: 85%

“…Attributing the high temperature transition to the Co-Co exchange interaction was supported by the study of YCo 3 B 2 [4], where only the T Co transition was observed. It was also supported by the study of HoCo 3 B 2 [5], where a ferromagnetic ordering was observed at T Co ∼ 150 K and ordering accompanied by a spin reorientation was observed at T Ho ≈ 12 K. The latter is attributed to an Ho-Ho exchange interaction similar to a Tb-Tb exchange interaction for TbCo 3 B 2 . In order to study the T Tb dependence on the magnetic properties of the R atom and to decouple the Co-Co (T Co ) from the Tb-Tb (T Tb ) transitions, five samples of Tb 1−x Y x Co 3 B 2 (x = 0.05, 0.1, 0.25, 0.4 and 0.5) were prepared and studied by various magnetic and crystallographic methods.…”

Section: Introductionsupporting

confidence: 52%

“…As temperature is lowered below T Tb the moments rotate towards the basal ab plane [3]. T Co was attributed to the Co-Co exchange interaction while T Tb was attributed to the 5 Author to whom any correspondence should be addressed.…”

Section: Introductionmentioning

confidence: 99%

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The effect of non-magnetic dilution of the Tb sublattice in TbCo₃B₂

Wolfson

Caspi²,

Ettedgui³

et al. 2009

J. Phys.: Condens. Matter

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Solid solutions of Tb(1-x)Y(x)Co(3)B(2) (x=0.05, 0.1, 0.25, 0.4 and 0.5) were studied by neutron powder diffraction, x-ray diffraction, AC susceptibility and SQUID magnetization measurements. Their magnetic and crystallographic properties were deduced and examined together with those previously published for the end compounds (x=0, 1). These solid solutions have hexagonal symmetry and are paramagnetic at RT, and undergo a magnetic ordering transition of the Co sublattice, with the magnetic moments along the hexagonal axis, at T(Co)∼150(15) K, independent of Y concentration. A second magnetic ordering transition of the Tb sublattice T(Tb)≤30 K accompanied by the rotation of the magnetic moments towards the basal plane, was observed for solid solutions with Y concentration x≤0.25. This transition was also found to be accompanied by a crystallographic symmetry decrease. Unexpectedly, neutron powder diffraction showed that the magnitude of the ordered magnetic moment of the Tb ion decreases with Tb concentration.

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Section: Results and Analysissupporting

confidence: 92%

Section: Discussionsupporting

confidence: 85%

Section: Introductionsupporting

confidence: 52%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The effect of non-magnetic dilution of the Tb sublattice in TbCo₃B₂

Wolfson

Caspi²,

Ettedgui³

et al. 2009

J. Phys.: Condens. Matter

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“…However, for TbCo 3 B 2 , the present NPD data show that Tb ͑LT͒ = 5.2͑1͒ B ͑Table III͒, which is significantly lower than the free-ion value. The NPD data of HoCo 3 B 2 show Ho ͑4 K͒ =5 B , 24 half of the free Ho-ion value. A similar result was deduced from macroscopic measurements on DyCo 3 B 2 , Dy ͑LT͒ϳ7.6 B , 29 compared to a free-ion value of Dy ϳ 10 B .…”

Section: Temperaturementioning

confidence: 95%

Magnetic ordering and spin-reorientation transitions inTbCo3B2

Dubman

Caspi²,

Ettedgui³

et al. 2005

Phys. Rev. B

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The magnetic structure of the compound TbCo 3 B 2 has been studied in the temperature range 1.5 K ഛ T ഛ 300 K by means of neutron powder diffraction, magnetization, magnetic ac susceptibility, and heat capacity measurements. The compound is of hexagonal symmetry and is paramagnetic at 300 K, undergoes a magnetic Co-Co ordering transition at ϳ170 K, and a second magnetic Tb-Tb ordering transition at ϳ30 K. The latter induces a spin-reorientation transition, in which the magnetic axis rotates from the c axis toward the basal plane. Below this transition a symmetry decrease ͑␥ magnetostriction͒ sets in, leading to an orthorhombic distortion of the crystal lattice. The crystal and magnetic structures and interactions and their evolution with temperature are discussed using a microscopic physical model.

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