Specific heat of NH4Br and NH4BrxCl1−x crystals close to the antiferroelectric transition

Yurtseven, H.; Yanik, A.

doi:10.1063/1.1989427

Cited by 4 publications

(1 citation statement)

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“…1. Similar interpretation has been given for the specific heat of NH 4 Br and NH 4 Br x Cl 1-x crystals in our recent study [46]. As we also indicated previously [46], this transition of ND 4 Cl close to a multicritical (P = 0.1 MPa) and second order (P = 150 MPa) can be classified as a weakly first-order or nearly second-order phase transition for the ammonium halides, which we have studied in some detail in our earlier works [26,36].…”

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confidence: 70%

Calculation of the specific heat close to the multicritical and second order phase regions in ND4Cl

Yurtseven

Yanik

2007

Struct Chem

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We calculated the specific heat C V of ND 4 Cl under the prediction of an Ising model presented here. Our calculated C V agrees with the experimental C P data for the multicritical (P = 0.1 MPa) and second order (P = 150 MPa) phase regions in this crystalline system. This agreement is particularly good above T C ðffi250 K) for the multicritical regime and below T C ðffi261 K) for the second order phase transition in ND 4 Cl. This shows that the observed behaviour of ND 4 Cl can be well described by an Ising model close to the phase transitions considered in this crystalline system.

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