Document Type

Article

Publication Date

1-1-1997

Publication Title

Physical Review B - Condensed Matter and Materials Physics

Abstract

Recently reported specific-heat measurements by Nakazawa and Kanoda between 20 and 50 K show no evidence for an expected antiferromagnetic ordering transition in the quasi-two-dimensional (2D) molecular conductor (Formula presented)-(BEDT-TTF)(Formula presented)Cu[N(CN)(Formula presented)]Cl [Y. Nakazawa and K. Kanoda, Phys. Rev. B 53, R8875 (1996)]. Although the absence of an observable transition was taken as evidence for 2D short-range ordering at elevated temperatures, even a small increase in pressure from the application of the grease used to mount the sample would shift this magnetic transition below 20 K. In their paper, Nakazawa and Kanoda erroneously assume that pressure-induced effects can be ruled out by the magnetic-field independence of the low-temperature specific heat below 3 K. In this Comment, we explain why this assumption is invalid. We conclude that specific-heat measurements in the intermediate temperature range of 3-20 K are needed before the absence of a discernible magnetic and/or pressure-induced phase transitions can be asserted.

Volume

56

Issue

2

First Page

949

Last Page

950

DOI

10.1103/PhysRevB.56.949

ISSN

10980121

Rights

© 1997 The American Physical Society.

Comments

Archived as published.

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