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Title: Observation of a Metallic Antiferromagnetic Phase and Metal to Nonmetal Transition in Ca{sub 3}Ru{sub 2}O{sub 7}

Abstract

Single crystal Ca{sub 3}Ru{sub 2}O{sub 7} shows a metallic antiferromagnetic phase intermediate between a first-order metal to nonmetal transition at T{sub M}=48K and the antiferromagnetic ordering (N{acute e}el) temperature, T{sub N}=56K. The metallic antiferromagnetic phase is predicted within various Mott-Hubbard models. Magnetization and electrical resistivity reveal strongly anisotropic metamagnetism in the nonmetallic antiferromagnetic phase. The charge and spin excitations are strongly coupled: The H-T phase diagrams determined by magnetization and magnetoresistivity are indistinguishable and reveal a multicritical point. The heat capacity of Ca{sub 3}Ru{sub 2}O{sub 7} suggests it is a highly correlated electron system. {copyright} {ital 1997} {ital The American Physical Society}

Authors:
; ;  [1];  [2]
  1. National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32306 (United States)
  2. Physics Department, Tufts University, Medford, Massachusetts 02155 (United States)
Publication Date:
OSTI Identifier:
467456
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 78; Journal Issue: 9; Other Information: PBD: Mar 1997
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; RUTHENIUM OXIDES; MAGNETIZATION; CALCIUM OXIDES; MAGNETIC SUSCEPTIBILITY; ELECTRIC CONDUCTIVITY; TEMPERATURE DEPENDENCE; MAGNETORESISTANCE; PHASE DIAGRAMS; PHASE TRANSFORMATIONS; ANTIFERROMAGNETISM; MONOCRYSTALS; SPECIFIC HEAT

Citation Formats

Cao, G., McCall, S., Crow, J., and Guertin, R.. Observation of a Metallic Antiferromagnetic Phase and Metal to Nonmetal Transition in Ca{sub 3}Ru{sub 2}O{sub 7}. United States: N. p., 1997. Web. doi:10.1103/PhysRevLett.78.1751.
Cao, G., McCall, S., Crow, J., & Guertin, R.. Observation of a Metallic Antiferromagnetic Phase and Metal to Nonmetal Transition in Ca{sub 3}Ru{sub 2}O{sub 7}. United States. doi:10.1103/PhysRevLett.78.1751.
Cao, G., McCall, S., Crow, J., and Guertin, R.. Sat . "Observation of a Metallic Antiferromagnetic Phase and Metal to Nonmetal Transition in Ca{sub 3}Ru{sub 2}O{sub 7}". United States. doi:10.1103/PhysRevLett.78.1751.
@article{osti_467456,
title = {Observation of a Metallic Antiferromagnetic Phase and Metal to Nonmetal Transition in Ca{sub 3}Ru{sub 2}O{sub 7}},
author = {Cao, G. and McCall, S. and Crow, J. and Guertin, R.},
abstractNote = {Single crystal Ca{sub 3}Ru{sub 2}O{sub 7} shows a metallic antiferromagnetic phase intermediate between a first-order metal to nonmetal transition at T{sub M}=48K and the antiferromagnetic ordering (N{acute e}el) temperature, T{sub N}=56K. The metallic antiferromagnetic phase is predicted within various Mott-Hubbard models. Magnetization and electrical resistivity reveal strongly anisotropic metamagnetism in the nonmetallic antiferromagnetic phase. The charge and spin excitations are strongly coupled: The H-T phase diagrams determined by magnetization and magnetoresistivity are indistinguishable and reveal a multicritical point. The heat capacity of Ca{sub 3}Ru{sub 2}O{sub 7} suggests it is a highly correlated electron system. {copyright} {ital 1997} {ital The American Physical Society}},
doi = {10.1103/PhysRevLett.78.1751},
journal = {Physical Review Letters},
number = 9,
volume = 78,
place = {United States},
year = {Sat Mar 01 00:00:00 EST 1997},
month = {Sat Mar 01 00:00:00 EST 1997}
}