Comprehensive magnetic phase diagrams of the polar metal Ca3(Ru0.95Fe0.05)2O7

Lei, Shiming; Chikara, Shalinee; Puggioni, Danilo; Peng, Jin; Zhu, Mengze; Gu, Mingqiang; Zhao, Weiwei; Wang, Yu; Yuan, Yakun; Akamatsu, Hirofumi; Chan, Moses W.; Ke, Xianglin; Mao, Zhiqiang; Rondinelli, James M.; Jaime, Marcelo; Singleton, John; Weickert, Franziska; Zapf, Vivien S.; Gopalan, Venkatraman

doi:10.1103/physrevb.99.224411

Title: Comprehensive magnetic phase diagrams of the polar metal Ca₃(Ru_0.95Fe_0.05)₂O₇

Journal Article · 10 June 2019 · Physical Review B

DOI: https://doi.org/10.1103/physrevb.99.224411 · OSTI ID:1670437

Lei, Shiming ^[1]; Chikara, Shalinee ^[2]; Puggioni, Danilo ^[3]; Peng, Jin ^[4]; Zhu, Mengze ^[5]; Gu, Mingqiang ^[3]; Zhao, Weiwei ^[1]; Wang, Yu ^[6]; Yuan, Yakun ^[1]; Akamatsu, Hirofumi ^[7]; Chan, Moses W. ^[1]; Ke, Xianglin ^[5]; Mao, Zhiqiang ^[8]; Rondinelli, James M. ^[3]; Jaime, Marcelo ^[2]; Singleton, John ^[2]; Weickert, Franziska ^[2]; Zapf, Vivien S. ^[2]; Gopalan, Venkatraman ^[1]

Pennsylvania State University, University Park, PA (United States)
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Northwestern University, Evanston, IL (United States)
Tulane University, New Orleans, LA (United States); Nanjing University (China)
Michigan State University, East Lansing, MI (United States)
Tulane University, New Orleans, LA (United States)
Tokyo Institute of Technology, Yokohama (Japan)
Tulane University, New Orleans, LA (United States); Pennsylvania State University, University Park, PA (United States)

Polar metals exist as a rather unique class of materials as they combine two seemingly mutually exclusive properties (polar order and metallicity) in one system. So far only a few polar metals have been unambiguously identified; the magnetic ones are exceptionally rare. Here we investigate a 5% Fe-doped polar metal Ca₃Ru₂O₇, via electrical transport, magnetization, microstrain, and optical second-harmonic generation measurements. We report the full magnetic phase diagrams (in the field-temperature space) for magnetic field H∥a and H∥b, which exhibit distinct field-dependent magnetizations behavior. In particular, for H∥a we found a ferromagnetic incommensurate spin structure, which is absent in the pure Ca₃Ru₂O₇. Furthermore, we propose a microscopic spin model to understand this behavior, highlighting the role of Fe doping in tipping the delicate balance of the underlying exchange-interaction energy in this system.

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Research Organization:: Louisiana State Univ., Baton Rouge, LA (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); USDOE

Grant/Contract Number:: SC0012432; SC0012375; DMR-1157490; DMR-1644779; 89233218CNA000001

OSTI ID:: 1670437

Alternate ID(s):: OSTI ID: 1546217; OSTI ID: 1776753

Report Number(s):: LA-UR-18-30772; TRN: US2203844

Journal Information:: Physical Review B, Vol. 99, Issue 22; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

Citation Metrics:

Cited by: 6 works

Citation information provided by
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75 CONDENSED MATTER PHYSICS
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Title: Comprehensive magnetic phase diagrams of the polar metal Ca3(Ru0.95Fe0.05)2O7

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Title: Comprehensive magnetic phase diagrams of the polar metal Ca₃(Ru_0.95Fe_0.05)₂O₇