Electrical and magnetic properties of antiferromagnetic rare earth disilicides

Labroo, Sunil; Hill, Peggy; Ali, Naushad

doi:10.1016/0022-5088(89)90508-0

Cited by 12 publications

(9 citation statements)

References 10 publications

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“…7): both χ and χ dc pass identical maxima at T N = 26 K. The negative θ p and the temperature independent χ is a good indication that this compound undergoes an antiferromagnetic transition at this temperature, too. This observation is in accord with literature [38][39][40]. Upon lowering the temperature, an additional but broad maximum (χ (T)) and wide shoulder (χ dc (T)) is observed.…”

Section: Gdsi 2 (α-Gdsi 2 Type)supporting

confidence: 92%

“…The temperature independent contribution χ o was found in the order of 4 × 10 −10 m 3 /mol. The magnetic moment also agrees with the literature data [38][39][40]. The ac (B = 10 mT) and the dc (B = 0.1 T) susceptibilities lead to the following results (inset Fig.…”

Section: Gdsi 2 (α-Gdsi 2 Type)supporting

confidence: 86%

“…However, we note a pronounced field dependence of χ and χ dc (different heights of the maximum and shoulder) as well as a temperature dependence of χ . Hence, it can be concluded that this compound also undergoes a ferromagnetic-like transition at a Curie temperature T C = 14 K. This second transition was not previously observed [38], but some authors report a second magnetic transition at T = 39 K [39,40], which was not encountered in this study.…”

Section: Gdsi 2 (α-Gdsi 2 Type)contrasting

confidence: 64%

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Structural chemistry, magnetism and electrical properties of binary Gd silicides and Ho3Si4

Roger

Babizhetskyy

Hiebl

et al. 2006

Journal of Alloys and Compounds

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Section: Gdsi 2 (α-Gdsi 2 Type)supporting

confidence: 92%

Section: Gdsi 2 (α-Gdsi 2 Type)supporting

confidence: 86%

Section: Gdsi 2 (α-Gdsi 2 Type)contrasting

confidence: 64%

See 1 more Smart Citation

Structural chemistry, magnetism and electrical properties of binary Gd silicides and Ho3Si4

Roger

Babizhetskyy

Hiebl

et al. 2006

Journal of Alloys and Compounds

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“…The lattice parameters were found to be a = 4.213(1) Å and c = 9.923(1) Å. The crystallographic parameters obtained from the Rietveld refinement of PrRuSi 3 are listed in Ta- structural phase transition to GdSi 2 -type orthorhombic structure (space group Imma) below 153 K. [19][20][21] Coincidentally the dc magnetic susceptibility of our compound PrRuSi 3 also exhibits two sharp anomalies at 8.6 K and 4.9 K which are very close to what have been observed in PrSi 2 . However, we do not observe any signature of ferromagnetic order in low temperature neutron diffraction data which suggests that the effect of impurity phase PrSi 2 , if any, is very small.…”

Section: Resultsmentioning

confidence: 97%

Signatures of spin-glass behavior in the induced magnetic moment system PrRuSi3

et al. 2011

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We have investigated the magnetic and transport properties of a ternary intermetallic compound PrRuSi3 using dc magnetization, ac susceptibility, specific heat, electrical resistivity, neutron diffraction, inelastic neutron scattering and µSR measurements. The magnetic susceptibility and specific heat data reveal the signatures of spin-glass behavior in PrRuSi3 with a freezing temperature of 9.8 K. At low magnetic fields, we observe two sharp anomalies (at 4.9 and 8.6 K) in magnetic susceptibility data. In contrast, the specific heat data show only a broad Schottky-type anomaly centered around 10 K. However, µSR reveals very low frequency coherent oscillations at 1.8 K with an onset of fast relaxation below 12 K indicating a long range magnetically ordered ground state with very small moment. On the other hand, no magnetic Bragg peaks are observed in low temperature neutron diffraction data at 1.8 K. These two contradictory ground states, spin-glass versus magnetic order, can be explained if the spin-glass behavior in PrRuSi3 is considered due to the dynamic fluctuations of the crystal field levels as has been proposed for spin-glass behavior in PrAu2Si2. Two sharp inelastic excitations near 2.4 meV and 14.7 meV are observed in the inelastic neutron scattering (INS) spectra between 4 K and 50 K. Further, exchange coupling Jex obtained from the analysis of INS data with CEF model provides evidence for the spontaneously induced magnetic order with a CEF-split singlet (Γt4) ground state. However, the exchange coupling seems to be close to the critical value for the induced moment magnetism, therefore we tend to believe that the dynamic fluctuations between the ground state singlet and excited doublet CEF levels is responsible for spin-glass behavior in PrRuSi3.

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“…However, a closer look at the temperature dependence of the ac magnetic susceptibility, resistivity and specific heat of PrSi 2 and PrIrSi 3 in the vicinity of transition show different behavior and the distinctness of magnetic behavior of PrIrSi 3 is evident. The ac susceptibility of PrSi 2 shows two well pronounced peaks at 11 K and 7 K [24]. In contrast the ac susceptibility of PrIrSi 3 shows sharp peak at 12.2 K and a kink at 13.5 K, and there is no peak near 7 K. The isothermal magnetization of PrSi 2 exhibits a rapid increase up to 1.5 T whereas the isothermal magnetization of PrIrSi 3 exhibits a rapid increase only up to 0.2 T. Further, PrSi 2 which forms in ThSi 2 -type tetragonal (space group I4 1 /amd) at room temperature undergoes a structural phase transition to GdSi 2 -type orthorhombic structure (space group Imma) below 180 K and a well defined anomaly due to structural transition is observed in resistivity of PrSi 2 [22,23].…”

Section: Methodsmentioning

confidence: 99%

Investigations of the singlet ground state system: PrIrSi₃

Anand¹,

Adroja²,

Bhattacharyya³

et al. 2014

J. Phys.: Condens. Matter

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We report our comprehensive study of physical properties of a ternary intermetallic compound PrIrSi3 investigated by dc magnetic susceptibility χ(T ), isothermal magnetization M (H), thermoremnant magnetization M (t), ac magnetic susceptibility χac(T ), specific heat Cp(T ), electrical resistivity ρ(T ), muon spin relaxation (µSR) and inelastic neutron scattering (INS) measurements. A magnetic phase transition is marked by a sharp anomaly at Ttr = 12.2 K in χ(T ) measured at low applied fields which is also reflected in the Cp(T ) data through a weak anomaly at 12 K. An irreversibility between the zero field cooled and field cooled χ(T ) data below 12.2 K and a very large relaxation time of M (t) indicates the presence of ferromagnetic correlation. The magnetic part of specific heat shows a broad Schottky-type anomaly near 40 K due to the crystal electric field (CEF) effect. An extremely small value of magnetic entropy below 12 K suggests a CEF-split singlet ground state which is confirmed from our analysis of INS data. The INS spectra show two prominent inelastic excitations at 8.5 meV and 18.5 meV that could be well accounted by a CEF model. The CEF splitting energy between the ground state singlet and the first excited doublet is found to be 92 K. Our µSR data reveal a possible magnetic ordering below 30 K which is much higher than that found from the specific heat and magnetic susceptibility measurements. This could be due to the presence of short range correlations well above the long range magnetic ordering or due to the electronic changes induced by muons. The induced moment magnetism in the singlet ground state system PrIrSi3 with such a large splitting energy of 92 K is quite surprising.

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Electrical and magnetic properties of antiferromagnetic rare earth disilicides

Cited by 12 publications

References 10 publications

Structural chemistry, magnetism and electrical properties of binary Gd silicides and Ho3Si4

Structural chemistry, magnetism and electrical properties of binary Gd silicides and Ho3Si4

Signatures of spin-glass behavior in the induced magnetic moment system PrRuSi3

Investigations of the singlet ground state system: PrIrSi₃

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Electrical and magnetic properties of antiferromagnetic rare earth disilicides

Cited by 12 publications

References 10 publications

Structural chemistry, magnetism and electrical properties of binary Gd silicides and Ho3Si4

Structural chemistry, magnetism and electrical properties of binary Gd silicides and Ho3Si4

Signatures of spin-glass behavior in the induced magnetic moment system PrRuSi3

Investigations of the singlet ground state system: PrIrSi3

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Product

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Investigations of the singlet ground state system: PrIrSi₃