Hydrostatic pressure effects on the magnetic susceptibility of ruthenium oxide Sr3Ru2O7: Evidence for pressure-enhanced antiferromagnetic instability

Yuri V. Sushko; Bruno DeHarak; Gang Cao; G. Shaw; D. K. Powell; J. W. Brill

doi:10.1016/j.ssc.2004.02.010

Hydrostatic pressure effects on the magnetic susceptibility of ruthenium oxide Sr₃Ru₂O₇: Evidence for pressure-enhanced antiferromagnetic instability

Yuri V. Sushko
, Bruno DeHarak
, Gang Cao
, G. Shaw
, D. K. Powell
, J. W. Brill

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

12 Scopus citations

Abstract

Hydrostatic pressure effects on the temperature- and magnetic field dependencies of the in-plane and out-of-plane magnetization of the bi-layered perovskite Sr₃Ru₂O₇ have been studied by SQUID magnetometer measurements under a hydrostatic helium-gas pressure. The anomalously enhanced low-temperature value of the paramagnetic susceptibility has been found to systematically decrease with increasing pressure. The effect is accompanied by an increase of the temperature T_max of a pronounced peak of susceptibility. Thus, magnetization measurements under hydrostatic pressure reveal that the lattice contraction in the structure of Sr₃Ru₂O₇ promotes antiferromagnetism and not ferromagnetism. The effects can be explained by the enhancement of the inter-bi-layer antiferromagnetic spin coupling, driven by the shortening of the superexchange path, and suppression, due to the band-broadening effect, of competing itinerant ferromagnetic correlations.

Original language	English
Pages (from-to)	341-346
Number of pages	6
Journal	Solid State Communications
Volume	130
Issue number	5
DOIs	https://doi.org/10.1016/j.ssc.2004.02.010
State	Published - May 2004

Bibliographical note

Funding Information:
This research was supported in part by the National Science Foundation, grants #DMR-9731257 and DMR-0100572

Funding

This research was supported in part by the National Science Foundation, grants #DMR-9731257 and DMR-0100572

Funders	Funder number
U.S. Department of Energy Chinese Academy of Sciences Guangzhou Municipal Science and Technology Project Oak Ridge National Laboratory Extreme Science and Engineering Discovery Environment National Science Foundation National Energy Research Scientific Computing Center National Natural Science Foundation of China	DMR-0100572, 9731257

Keywords

A. Ruthenates
D. Antiferromagnetism
D. Ferromagnetism
D. SQUID magnetometry
E. High pressure

ASJC Scopus subject areas

General Chemistry
Condensed Matter Physics
Materials Chemistry

Access to Document

10.1016/j.ssc.2004.02.010

Cite this

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title = "Hydrostatic pressure effects on the magnetic susceptibility of ruthenium oxide Sr3Ru2O7: Evidence for pressure-enhanced antiferromagnetic instability",

abstract = "Hydrostatic pressure effects on the temperature- and magnetic field dependencies of the in-plane and out-of-plane magnetization of the bi-layered perovskite Sr3Ru2O7 have been studied by SQUID magnetometer measurements under a hydrostatic helium-gas pressure. The anomalously enhanced low-temperature value of the paramagnetic susceptibility has been found to systematically decrease with increasing pressure. The effect is accompanied by an increase of the temperature Tmax of a pronounced peak of susceptibility. Thus, magnetization measurements under hydrostatic pressure reveal that the lattice contraction in the structure of Sr3Ru2O7 promotes antiferromagnetism and not ferromagnetism. The effects can be explained by the enhancement of the inter-bi-layer antiferromagnetic spin coupling, driven by the shortening of the superexchange path, and suppression, due to the band-broadening effect, of competing itinerant ferromagnetic correlations.",

keywords = "A. Ruthenates, D. Antiferromagnetism, D. Ferromagnetism, D. SQUID magnetometry, E. High pressure",

author = "Sushko, \{Yuri V.\} and Bruno DeHarak and Gang Cao and G. Shaw and Powell, \{D. K.\} and Brill, \{J. W.\}",

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TY - JOUR

T1 - Hydrostatic pressure effects on the magnetic susceptibility of ruthenium oxide Sr3Ru2O7

T2 - Evidence for pressure-enhanced antiferromagnetic instability

AU - Sushko, Yuri V.

AU - DeHarak, Bruno

AU - Cao, Gang

AU - Shaw, G.

AU - Powell, D. K.

AU - Brill, J. W.

PY - 2004/5

Y1 - 2004/5

N2 - Hydrostatic pressure effects on the temperature- and magnetic field dependencies of the in-plane and out-of-plane magnetization of the bi-layered perovskite Sr3Ru2O7 have been studied by SQUID magnetometer measurements under a hydrostatic helium-gas pressure. The anomalously enhanced low-temperature value of the paramagnetic susceptibility has been found to systematically decrease with increasing pressure. The effect is accompanied by an increase of the temperature Tmax of a pronounced peak of susceptibility. Thus, magnetization measurements under hydrostatic pressure reveal that the lattice contraction in the structure of Sr3Ru2O7 promotes antiferromagnetism and not ferromagnetism. The effects can be explained by the enhancement of the inter-bi-layer antiferromagnetic spin coupling, driven by the shortening of the superexchange path, and suppression, due to the band-broadening effect, of competing itinerant ferromagnetic correlations.

AB - Hydrostatic pressure effects on the temperature- and magnetic field dependencies of the in-plane and out-of-plane magnetization of the bi-layered perovskite Sr3Ru2O7 have been studied by SQUID magnetometer measurements under a hydrostatic helium-gas pressure. The anomalously enhanced low-temperature value of the paramagnetic susceptibility has been found to systematically decrease with increasing pressure. The effect is accompanied by an increase of the temperature Tmax of a pronounced peak of susceptibility. Thus, magnetization measurements under hydrostatic pressure reveal that the lattice contraction in the structure of Sr3Ru2O7 promotes antiferromagnetism and not ferromagnetism. The effects can be explained by the enhancement of the inter-bi-layer antiferromagnetic spin coupling, driven by the shortening of the superexchange path, and suppression, due to the band-broadening effect, of competing itinerant ferromagnetic correlations.

KW - A. Ruthenates

KW - D. Antiferromagnetism

KW - D. Ferromagnetism

KW - D. SQUID magnetometry

KW - E. High pressure

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