ac-Calorimetry of (TMTSF)2PF6

D. K. Powell; K. P. Starkey; G. Shaw; Y. V. Sushko; L. K. Montgomery; J. W. Brill

doi:10.1016/S0038-1098(01)00287-3

ac-Calorimetry of (TMTSF)₂PF₆

D. K. Powell, K. P. Starkey, G. Shaw, Y. V. Sushko, L. K. Montgomery, J. W. Brill

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

We have searched for dynamic thermal effects in (TMTSF)₂PF₆ by measuring its specific heat with ac calorimetry. Near its spin-density-wave transition (T_c=12 K), the magnitude of the specific heat is the same as that measured in quasi-static measurements, indicating that there are no kinetic contributions to the specific heat at these temperatures. The anomaly at T_c is consistent with the Ehrenfest relation estimate for a continuous phase transition. No anomalies are observed in a pellet of (TMTSF)₂PF₆ mixed with KBr at T_c or the expected "spin-density-wave glass" transition (T_g∼3.5 K), suggesting that residual disorder in the pellet freezes in a glassy state at T_c.

Original language	English
Pages (from-to)	637-640
Number of pages	4
Journal	Solid State Communications
Volume	119
Issue number	10-11
DOIs	https://doi.org/10.1016/S0038-1098(01)00287-3
State	Published - Aug 29 2001

Bibliographical note

Funding Information:
We appreciate the assistance of S. Rimmer in X-ray diffraction and helpful discussions with K. Biljakovic and J. Brooks. This research was supported in part by the National Science Foundation, Grants DMR-9731257, DMR-9414268, and DMR-9300507.

Funding

We appreciate the assistance of S. Rimmer in X-ray diffraction and helpful discussions with K. Biljakovic and J. Brooks. This research was supported in part by the National Science Foundation, Grants DMR-9731257, DMR-9414268, and DMR-9300507.

Funders	Funder number
National Science Foundation (NSF)	DMR-9300507, DMR-9414268, DMR-9731257

Keywords

A. organic crystals
B. heat capacity
B. phase transitions

ASJC Scopus subject areas

General Chemistry
Condensed Matter Physics
Materials Chemistry

Access to Document

10.1016/S0038-1098(01)00287-3

Cite this

@article{71561a9dd6744d7c8cb2919fb5533873,

title = "ac-Calorimetry of (TMTSF)2PF6",

abstract = "We have searched for dynamic thermal effects in (TMTSF)2PF6 by measuring its specific heat with ac calorimetry. Near its spin-density-wave transition (Tc=12 K), the magnitude of the specific heat is the same as that measured in quasi-static measurements, indicating that there are no kinetic contributions to the specific heat at these temperatures. The anomaly at Tc is consistent with the Ehrenfest relation estimate for a continuous phase transition. No anomalies are observed in a pellet of (TMTSF)2PF6 mixed with KBr at Tc or the expected {"}spin-density-wave glass{"} transition (Tg∼3.5 K), suggesting that residual disorder in the pellet freezes in a glassy state at Tc.",

keywords = "A. organic crystals, B. heat capacity, B. phase transitions",

author = "Powell, {D. K.} and Starkey, {K. P.} and G. Shaw and Sushko, {Y. V.} and Montgomery, {L. K.} and Brill, {J. W.}",

note = "Funding Information: We appreciate the assistance of S. Rimmer in X-ray diffraction and helpful discussions with K. Biljakovic and J. Brooks. This research was supported in part by the National Science Foundation, Grants DMR-9731257, DMR-9414268, and DMR-9300507. ",

year = "2001",

month = aug,

day = "29",

doi = "10.1016/S0038-1098(01)00287-3",

language = "English",

volume = "119",

pages = "637--640",

number = "10-11",

}

TY - JOUR

T1 - ac-Calorimetry of (TMTSF)2PF6

AU - Powell, D. K.

AU - Starkey, K. P.

AU - Shaw, G.

AU - Sushko, Y. V.

AU - Montgomery, L. K.

AU - Brill, J. W.

N1 - Funding Information: We appreciate the assistance of S. Rimmer in X-ray diffraction and helpful discussions with K. Biljakovic and J. Brooks. This research was supported in part by the National Science Foundation, Grants DMR-9731257, DMR-9414268, and DMR-9300507.

PY - 2001/8/29

Y1 - 2001/8/29

N2 - We have searched for dynamic thermal effects in (TMTSF)2PF6 by measuring its specific heat with ac calorimetry. Near its spin-density-wave transition (Tc=12 K), the magnitude of the specific heat is the same as that measured in quasi-static measurements, indicating that there are no kinetic contributions to the specific heat at these temperatures. The anomaly at Tc is consistent with the Ehrenfest relation estimate for a continuous phase transition. No anomalies are observed in a pellet of (TMTSF)2PF6 mixed with KBr at Tc or the expected "spin-density-wave glass" transition (Tg∼3.5 K), suggesting that residual disorder in the pellet freezes in a glassy state at Tc.

AB - We have searched for dynamic thermal effects in (TMTSF)2PF6 by measuring its specific heat with ac calorimetry. Near its spin-density-wave transition (Tc=12 K), the magnitude of the specific heat is the same as that measured in quasi-static measurements, indicating that there are no kinetic contributions to the specific heat at these temperatures. The anomaly at Tc is consistent with the Ehrenfest relation estimate for a continuous phase transition. No anomalies are observed in a pellet of (TMTSF)2PF6 mixed with KBr at Tc or the expected "spin-density-wave glass" transition (Tg∼3.5 K), suggesting that residual disorder in the pellet freezes in a glassy state at Tc.

KW - A. organic crystals

KW - B. heat capacity

KW - B. phase transitions

UR - http://www.scopus.com/inward/record.url?scp=0035968431&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0035968431&partnerID=8YFLogxK

U2 - 10.1016/S0038-1098(01)00287-3

DO - 10.1016/S0038-1098(01)00287-3

M3 - Article

AN - SCOPUS:0035968431

SN - 0038-1098

VL - 119

SP - 637

EP - 640

JO - Solid State Communications

JF - Solid State Communications

IS - 10-11

ER -