Crystal-field effects and the magnetic properties of rare-earth rhodium borides

Dunlap, B. D.; Hall, L. N.; Behroozi, F.; Crabtree, G. W.; Niarchos, D.

doi:10.1103/physrevb.29.6244

Cited by 98 publications

(47 citation statements)

References 15 publications

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“…The T N values do not vary systematically with R for the light rare-earth compounds (R ¼Ce-Sm), whereas they shift systematically to low temperature as the rare-earth element changes from Tb to Tm. The magnetic properties of this family show relatively simple behavior, which seems to follow a classical AFM order with a strong anisotropy due to the CEF effect as can be inferred by comparing GdNiGe 3 with TbNiGe 3 [32].…”

Section: Magnetic Susceptibility Of Rnige 3 (R¼ce-tm)mentioning

confidence: 89%

Physical properties and anisotropies of the RNiGe3 series (R = Y, Ce–Nd, Sm, Gd–Lu)

Mun

Bud’ko

et al. 2010

Journal of Magnetism and Magnetic Materials

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Section: Magnetic Susceptibility Of Rnige 3 (R¼ce-tm)mentioning

confidence: 89%

Physical properties and anisotropies of the RNiGe3 series (R = Y, Ce–Nd, Sm, Gd–Lu)

Mun

Bud’ko

et al. 2010

Journal of Magnetism and Magnetic Materials

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“…18(b). In magnetically ordered systems, it was argued that CEF effects can enhance the ordering temperature in materials with a strong axial anisotropy [45,46]. In quasicrystals, although anisotropy is not well defined, the CEF effects do exist for rare-earth ions that have a finite orbital angular momentum of their 4f electrons.…”

Section: Discussionmentioning

confidence: 99%

Magnetic and transport properties of i- R -Cd icosahedral quasicrystals (R=Y,Gd-Tm)

et al. 2014

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We present a detailed characterization of the recently discovered i-R-Cd (R=Y,Gd-Tm) binary quasicrystals by means of x-ray diffraction, temperature-dependent dc and ac magnetization, temperature-dependent resistance, and temperature-dependent specific heat measurements. Structurally, the broadening of x-ray diffraction peaks found for i-R-Cd is dominated by frozen-in phason strain, which is essentially independent of R. i-Y-Cd is weakly diamagnetic and manifests a temperature-independent susceptibility. i-Gd-Cd can be characterized as a spin glass below 4.6 K via dc magnetization cusp, a third order nonlinear magnetic susceptibility peak, a frequency-dependent freezing temperature, and a broad maximum in the specific heat. i-R-Cd (R=Ho-Tm) is similar to i-Gd-Cd in terms of features observed in thermodynamic measurements. i-TbCd and i-Dy-Cd do not show a clear cusp in their zero-field-cooled dc magnetization data, but instead show a more rounded, broad local maximum. The resistivity for i-R-Cd is of order 300μΩ cm and weakly temperature dependent. The characteristic freezing temperatures for i-R-Cd (R=Gd-Tm) deviate from the de Gennes scaling, in a manner consistent with crystal electric field splitting induced local moment anisotropy. We present a detailed characterization of the recently discovered i-R-Cd (R = Y, Gd-Tm) binary quasicrystals by means of x-ray diffraction, temperature-dependent dc and ac magnetization, temperature-dependent resistance, and temperature-dependent specific heat measurements. Structurally, the broadening of x-ray diffraction peaks found for i-R-Cd is dominated by frozen-in phason strain, which is essentially independent of R. i-Y-Cd is weakly diamagnetic and manifests a temperature-independent susceptibility. i-Gd-Cd can be characterized as a spin glass below 4.6 K via dc magnetization cusp, a third order nonlinear magnetic susceptibility peak, a frequency-dependent freezing temperature, and a broad maximum in the specific heat. i-R-Cd (R = Ho-Tm) is similar to i-Gd-Cd in terms of features observed in thermodynamic measurements. i-Tb-Cd and i-Dy-Cd do not show a clear cusp in their zero-field-cooled dc magnetization data, but instead show a more rounded, broad local maximum. The resistivity for i-R-Cd is of order 300 μ cm and weakly temperature dependent. The characteristic freezing temperatures for i-R-Cd (R = Gd-Tm) deviate from the de Gennes scaling, in a manner consistent with crystal electric field splitting induced local moment anisotropy. Keywords Physics and Astronomy Disciplines Condensed Matter Physics Magnetic and transport properties of i-R-Cd icosahedral quasicrystals (R=Y, Gd-Tm)

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“…However, there was no attempt previously to investigate the Tb member, for which the Néel temperature (TN= T1= ~ 63 K) is the highest within this family. Such a high value within a given R series has been known [26][27][28] to be a consequence of single-ion anisotropy on magnetism. Naturally, this compound is suited to the aim outlined above.…”

Section: Introductionmentioning

confidence: 94%

Extraordinarily large intrinsic magnetodielectric coupling of the Tb member within the Haldane spin-chain family R2BaNiO5

2017

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The Haldane spin-chain compound, Tb2BaNiO5, has been known to order antiferromagnetically below (TN=) 63 K. The present magnetic studies on the polycrystals bring out that there is another magnetic transition at a lower temperature (T2=) 25 K, with a pronounced magnetic-field induced metamagnetic and metaelectric behavior. Multiferroic features are found below T2 only, and not at TN. The most intriguing observation is that the observed change of dielectric constant (Δε) is intrinsic and largest (e.g., ~ 18% at 15 K) within this Haldane spin-chain family, R2BaNiO5. Taking into account the fact that this trend (that is, the largest value of Δε for Tb case within this family) correlates well with a similar trend in TN (with the values of TN being ~55, 58, 53 and 32 K for Gd, Dy, Ho and Er cases), we believe that the explanation usually offered for this TN behavior in rare-earth systems is applicable for this Δε behavior as well. That is, single-ion anisotropy following crystal-field splitting is responsible for the extraordinary magnetodielectric effect in this Tb case. To our knowledge, such an observation was not made in the past literature of multiferroics.

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Crystal-field effects and the magnetic properties of rare-earth rhodium borides

Cited by 98 publications

References 15 publications

Physical properties and anisotropies of the RNiGe3 series (R = Y, Ce–Nd, Sm, Gd–Lu)

Physical properties and anisotropies of the RNiGe3 series (R = Y, Ce–Nd, Sm, Gd–Lu)

Magnetic and transport properties of i- R -Cd icosahedral quasicrystals (R=Y,Gd-Tm)

Extraordinarily large intrinsic magnetodielectric coupling of the Tb member within the Haldane spin-chain family R2BaNiO5

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