Novel phase transition in non-antiferromagnetically ordered crystals of La 2CuO 4

S-W Cheong,Z Fisk,J.O Willis,S.E Brown,J.D Thompson,J.P Remeika,A.S Cooper,R.M Aikin,D Schiferl,G Gruner

doi:10.1016/0038-1098(88)90669-2

S-W Cheong, Z Fisk + Show 8 more

Open Access

https://doi.org/10.1016/0038-1098(88)90669-2

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Abstract

We report the discovery of a new phase diagram in the magnetic field-temperature plane for single crystals of La 2CuO 4 that show no sign of antiferromagnetic order. The phase boundary is defined by magneto-resistance and susceptibility measurements. We discuss several possibilities that may lead to the phase diagram observed.

Highlights

We reportthediscoveryofa new phasediagraminthemagneticfield temperature plane for single crystals o£ La2Cu04 that show no sign of antiferromagnetic order
Work by Johnstonetal . a n d Freltoft et al i on the variation of the Neel temperature (TN) of La2Od04_6 asafunction of 5 in sintered powders and crystals indicates that TN approacheszeroas 6 g o e s to z e r o
To provide further understanding of the highly unusualphysicalproperties of La2Cu04, we have investigated the magnetic, transport and thermal properties of single crystals in magnetic fields applied in different directions with respect to the Cu-O plane

Summary

Introduction

We reportthediscoveryofa new phasediagraminthemagneticfield temperature plane for single crystals o£ La2Cu04 that show no sign of antiferromagnetic order. La2CuO~ sampleinzeroapplied magnetic field which does not show any antiferromagnetic ordering-like resistance anomaly.

Results

Conclusion