Magnetoentropic signatures of the textured metamagnetic phase of an antiferromagnetic polar metal: Ca3Ru2O7

Naoki Kikugawa; Dmitry A. Sokolov; Chanchal Sow; Yoshiteru Maeno; Andrew Peter Mackenzie

doi:10.7566/jpsj.90.103704

Magnetoentropic signatures of the textured metamagnetic phase of an antiferromagnetic polar metal: Ca₃Ru₂O₇

Naoki Kikugawa, Dmitry A. Sokolov, Chanchal Sow, Yoshiteru Maeno, Andrew Peter Mackenzie

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

Abstract

We report the magnetocaloric effect of a bilayered perovskite ruthenate Ca₃Ru₂O₇that has recently been recognized as an antiferromagnetic polar metal. The magnetic entropy change obtained from temperature dependence of the DC magnetization measurements shows peaks and valleys under the magnetic field near metamagnetic transitions, and enable us to map out a thermodynamic field–temperature phase-diagram. The area surrounded by the boundaries agrees well with a novel “metamagnetic texture” with spin modulation observed recently by small angle neutron scattering measurements. We demonstrate that a thermodynamically equilibrium state is realized between the antiferromagnetic and spin-polarized states throughout the metamagnetic transition in this polar metal.

Original language	English
Article number	103704
Number of pages	5
Journal	Journal of the Physical Society of Japan
Volume	90
Issue number	10
Early online date	21 Sept 2021
DOIs	https://doi.org/10.7566/jpsj.90.103704
Publication status	Published - 15 Oct 2021

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Kikugawa-2021-Ca3Ru2O7_MCE_JPSJ-AAM
Copyright © 2021 Physical Society of Japan. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the author created accepted manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.7566/JPSJ.90.103704.
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Magnetoentropic signatures of the textured metamagnetic phase of an antiferromagnetic polar metal: Ca3Ru2O7 (dataset)
Kikugawa, N. (Creator), Sokolov, D. (Creator), Sow, C. (Creator), Maeno, Y. (Creator) & Mackenzie, A. (Creator), University of St Andrews, 5 Oct 2021
DOI: 10.17630/18577027-176a-49c3-a36f-fa64444fcf82
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title = "Magnetoentropic signatures of the textured metamagnetic phase of an antiferromagnetic polar metal: Ca3Ru2O7",

abstract = "We report the magnetocaloric effect of a bilayered perovskite ruthenate Ca3Ru2O7 that has recently been recognized as an antiferromagnetic polar metal. The magnetic entropy change obtained from temperature dependence of the DC magnetization measurements shows peaks and valleys under the magnetic field near metamagnetic transitions, and enable us to map out a thermodynamic field–temperature phase-diagram. The area surrounded by the boundaries agrees well with a novel “metamagnetic texture” with spin modulation observed recently by small angle neutron scattering measurements. We demonstrate that a thermodynamically equilibrium state is realized between the antiferromagnetic and spin-polarized states throughout the metamagnetic transition in this polar metal.",

author = "Naoki Kikugawa and Sokolov, {Dmitry A.} and Chanchal Sow and Yoshiteru Maeno and Mackenzie, {Andrew Peter}",

note = "This work is supported by a KAKENHI Grants-in-Aids for Scientific Research (Grant Nos. 17H06136, 18K04715, and 21H01033), and Core-to-Core Program (No. JPJSCCA20170002) from the Japan Society for the Promotion of Science (JSPS) and by a JST-Mirai Program (Grant No. JPMJMI18A3), and by the Max Planck Society.",

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language = "English",

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T1 - Magnetoentropic signatures of the textured metamagnetic phase of an antiferromagnetic polar metal

T2 - Ca3Ru2O7

AU - Kikugawa, Naoki

AU - Sokolov, Dmitry A.

AU - Sow, Chanchal

AU - Maeno, Yoshiteru

AU - Mackenzie, Andrew Peter

N1 - This work is supported by a KAKENHI Grants-in-Aids for Scientific Research (Grant Nos. 17H06136, 18K04715, and 21H01033), and Core-to-Core Program (No. JPJSCCA20170002) from the Japan Society for the Promotion of Science (JSPS) and by a JST-Mirai Program (Grant No. JPMJMI18A3), and by the Max Planck Society.

PY - 2021/10/15

Y1 - 2021/10/15

N2 - We report the magnetocaloric effect of a bilayered perovskite ruthenate Ca3Ru2O7 that has recently been recognized as an antiferromagnetic polar metal. The magnetic entropy change obtained from temperature dependence of the DC magnetization measurements shows peaks and valleys under the magnetic field near metamagnetic transitions, and enable us to map out a thermodynamic field–temperature phase-diagram. The area surrounded by the boundaries agrees well with a novel “metamagnetic texture” with spin modulation observed recently by small angle neutron scattering measurements. We demonstrate that a thermodynamically equilibrium state is realized between the antiferromagnetic and spin-polarized states throughout the metamagnetic transition in this polar metal.

AB - We report the magnetocaloric effect of a bilayered perovskite ruthenate Ca3Ru2O7 that has recently been recognized as an antiferromagnetic polar metal. The magnetic entropy change obtained from temperature dependence of the DC magnetization measurements shows peaks and valleys under the magnetic field near metamagnetic transitions, and enable us to map out a thermodynamic field–temperature phase-diagram. The area surrounded by the boundaries agrees well with a novel “metamagnetic texture” with spin modulation observed recently by small angle neutron scattering measurements. We demonstrate that a thermodynamically equilibrium state is realized between the antiferromagnetic and spin-polarized states throughout the metamagnetic transition in this polar metal.

U2 - 10.7566/jpsj.90.103704

DO - 10.7566/jpsj.90.103704

M3 - Article

SN - 0031-9015

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JO - Journal of the Physical Society of Japan

JF - Journal of the Physical Society of Japan

IS - 10

M1 - 103704

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Magnetoentropic signatures of the textured metamagnetic phase of an antiferromagnetic polar metal: Ca3Ru2O7

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Magnetoentropic signatures of the textured metamagnetic phase of an antiferromagnetic polar metal: Ca3Ru2O7 (dataset)

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Magnetoentropic signatures of the textured metamagnetic phase of an antiferromagnetic polar metal: Ca₃Ru₂O₇