Low-temperature specific heat of TlCrS2

Aldzhanov, M. A.; Abdurragimov, A. A.; Sultanova, S. G.; Nadzhafzade, M. D.

doi:10.1134/s1063783407020229

Cited by 5 publications

(4 citation statements)

References 2 publications

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“…The rather larger deviation of μ eff from the theoretical value indicates the presence of quasi two-dimensional magnetic ordering in the paramagnetic area of layered ferromagnets, TlCrS 2 and TlCrSe 2 . Low-dimensional magnetic structure of these ferromagnets is also noted in Aldzhanov et al (1996Aldzhanov et al ( , 2007.…”

Section: Magnetic Properties Of Tlcrsmentioning

confidence: 65%

Phase transitions and their co-existence in TlGaSe2–TlCrS2(Se2) systems

et al. 2013

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Investigation of dielectric properties of layered compound, TlGaSe 2 , showed that it is a ferroelectric (T c = 105•5 K) with an intermediate incommensurate phase (T i = 114•5 K). Our magnetic studies of layered compounds, TlCrS 2 and TlCrSe 2 , for the first time revealed that the magnetic phase transition in these compounds are quasi two-dimensional ferromagnetic in nature and magnetic characteristics are T C = 90 K, T p C = 115 K, μ eff = 3•26 μ B and T C = 105 K, T p C = 120 K, μ eff = 3•05 μ B , respectively. Using the method of DTA, areas of homogeneous and heterogeneous coexistence of ferroelectric and ferromagnetic phase transitions in the systems, TlGaSe 2-TlCrS 2 and TlGaSe 2-TlCrSe 2 , were identified. The low-dimensional solid solutions and eutectic alloys in these systems can be used as basic materials for plenty of functional recorders.

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Section: Magnetic Properties Of Tlcrsmentioning

confidence: 65%

Phase transitions and their co-existence in TlGaSe2–TlCrS2(Se2) systems

et al. 2013

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“…According to this model, behavior of low-dimensional spin systems in the area of high temperatures (paramagnetic area), around phase transition to ordered magnetic state and in the area of low temperatures has specific peculiarities, which sharply differ them from behavior of threedimensional spin systems. For example, temperature dependence of magnetic susceptibility of low-dimensional antiferromagnet in paramagnetic area of temperatures with T T N (T N -Neel point, below which three-dimensional antiferromagnetic ordering is possible), is characterized by the presence of wide maximum, which is bound with highly developed short-range magnetic order, and on the temperature dependence of thermal capacity of lowdimensional magnets anomaly with evident deviation from -type is observed [19,[24][25][26].…”

Section: Resultsmentioning

confidence: 99%

The magneto-dielectric properties of compounds and alloys in the systems of TlInS2–TlFeS2, TlInS2–TlFeSe2

Veliyev¹,

Seyidov²,

Gasanov³

et al. 2010

Journal of Alloys and Compounds

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“…This point is arbitrary and the possible phase transition ought to be incommensurate. At the same time, the available experimental data on C P (heat capacity at constant pressure) of TlInSe 2 [9][10][11][12] are ambiguous as a clear manifestation of phase transition. The heat effects (if any) which accompany the transition are small and indicative of the dependence of the obtained results on the thermal history of the measured samples [10,12].…”

mentioning

confidence: 99%

“…At the same time, the available experimental data on C P (heat capacity at constant pressure) of TlInSe 2 [9][10][11][12] are ambiguous as a clear manifestation of phase transition. The heat effects (if any) which accompany the transition are small and indicative of the dependence of the obtained results on the thermal history of the measured samples [10,12]. According to our very recent observations, the negative differential re-Debye temperatures and Grueneisen parameters of chain TlSe and TlInSe 2 were calculated using our earlier obtained abinitio results on phonon band structure and existed experimental data on thermal expansion coefficient.…”

mentioning

confidence: 99%

Debye temperatures and Grueneisen parameters of chain TlSe and TlInSe₂

Mamedov

Wakita

Оруджев

et al. 2009

Phys. Status Solidi (c)

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Debye temperatures and Grueneisen parameters of chain TlSe and TlInSe2 were calculated using our earlier obtained ab‐initio results on phonon band structure and existed experimental data on thermal expansion coefficient. For both compounds, the values of heat capacity at constant volume (Cv) were found to obey cubic law at temperatures less than 2 K. The Debye temperatures were determined to be 95 K and 96 K for TlSe and TInSe2, respectively. The unit cells of TlSe and TInSe2 were relaxed by minimizing Hellman‐Feynman forces and the total energy dependence on the unit cell volume was obtained. The bulk modulus (B0) values in Murnaghan and Birch‐Murnaghan equations of state were shown to be very close to each other. By using above B0 and Cv, as well as available experimental data on linear expansion, the heat capacity at constant pressure (CP) was evaluated. Comparison with experimental CP in a wide temperature range showed a good agreement for TlInSe2 and a noticeable discrepancy for TlSe at temperatures above 170 K. The calculated Grueneisen parameter of TlInSe2 showed a tendency to saturation in a region above Debye temperature. The situation with TlSe is not clear because of the ambiguous character of the available experimental data on thermal expansion. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Low-temperature specific heat of TlCrS2

Cited by 5 publications

References 2 publications

Phase transitions and their co-existence in TlGaSe2–TlCrS2(Se2) systems

Phase transitions and their co-existence in TlGaSe2–TlCrS2(Se2) systems

The magneto-dielectric properties of compounds and alloys in the systems of TlInS2–TlFeS2, TlInS2–TlFeSe2

Debye temperatures and Grueneisen parameters of chain TlSe and TlInSe₂

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