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Title: Metastable states in the frustrated triangular compounds Ca 3 Co 2 - x Mn x O 6 and Ca 3 Co 2 O 6

Abstract

The observation of unusual metastable behavior in Ca 3Co 2O 6 remains an ongoing puzzle. When the magnetic field is increased at certain very slow rates, evenly spaced steps occur in the magnetization and other physical quantities as a function of magnetic field every 1.2 T. The ground state without steps is approached by slow relaxation processes over hours to days. It is a striking example of extremely slow dynamics arising from geometrical frustration in an otherwise clean and long-range ordered system, and its precise description remains controversial. Here we shed light on the mystery by reporting similar behavior in isostructural Ca 3Co 2-xMnxO 6, albeit at magnetic field sweep rates that are six orders of magnitude faster than that in Ca 3Co 2O 6. We observe these steps not only in the magnetization, but also in the magnetostriction, electric polarization, and magnetocaloric effect. Here, we present a study of metastable behavior in both compounds across seven orders of magnitude of magnetic field sweep rates using unique magnets at the National High Magnetic Field Laboratory. The metastable steps occur for intermediate ranges of magnetic field sweep rates, vanishing or evolving for the fastest and slowest sweep rates. Our data supportmore » that these metastable steps are an intrinsic feature of the three-dimensionally frustrated geometry of Ising spins in this structural family and thus narrow the number of applicable models.« less

Authors:
 [1];  [2]; ORCiD logo [3];  [4]; ORCiD logo [3]; ORCiD logo [3];  [5];  [6];  [6];  [5]; ORCiD logo [3]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); National High Magnetic Field Lab. (MagLab), Los Alamos, NM (United States); Rutgers Univ., Piscataway, NJ (United States). Rutgers Center for Emergent Materials & Dept. of Physics and Astronomy
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); National High Magnetic Field Lab. (MagLab), Los Alamos, NM (United States); Simon Fraser Univ., Burnaby, BC (Canada). Dept. of Physics
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); National High Magnetic Field Lab. (MagLab), Los Alamos, NM (United States)
  4. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); National High Magnetic Field Lab. (MagLab), Los Alamos, NM (United States); Univ. of California, Los Angeles, CA (United States)
  5. Rutgers Univ., Piscataway, NJ (United States). Rutgers Center for Emergent Materials & Dept. of Physics and Astronomy
  6. Chinese Academy of Sciences (CAS), Beijing (China). Beijing National Lab. for Condensed Matter Physics, Inst. of Physics
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Laboratory Directed Research and Development (LDRD) Program
OSTI Identifier:
1479979
Alternate Identifier(s):
OSTI ID: 1459470
Report Number(s):
LA-UR-17-28067
Journal ID: ISSN 2469-9950; PRBMDO
Grant/Contract Number:  
AC52-06NA25396; FG02-07ER46382
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 98; Journal Issue: 2; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; High Magnetic Field Science

Citation Formats

Kim, Jae Wook, Mun, Eun Deok, Ding, Xiaxin, Hansen, Anders, Jaime, Marcelo, Harrison, Neil, Yi, H. T., Chai, Yisheng, Sun, Young, Cheong, Sang-Wook, and Zapf, Vivien S. Metastable states in the frustrated triangular compounds Ca3Co2-xMnxO6 and Ca3Co2O6. United States: N. p., 2018. Web. doi:10.1103/PhysRevB.98.024407.
Kim, Jae Wook, Mun, Eun Deok, Ding, Xiaxin, Hansen, Anders, Jaime, Marcelo, Harrison, Neil, Yi, H. T., Chai, Yisheng, Sun, Young, Cheong, Sang-Wook, & Zapf, Vivien S. Metastable states in the frustrated triangular compounds Ca3Co2-xMnxO6 and Ca3Co2O6. United States. doi:10.1103/PhysRevB.98.024407.
Kim, Jae Wook, Mun, Eun Deok, Ding, Xiaxin, Hansen, Anders, Jaime, Marcelo, Harrison, Neil, Yi, H. T., Chai, Yisheng, Sun, Young, Cheong, Sang-Wook, and Zapf, Vivien S. Mon . "Metastable states in the frustrated triangular compounds Ca3Co2-xMnxO6 and Ca3Co2O6". United States. doi:10.1103/PhysRevB.98.024407. https://www.osti.gov/servlets/purl/1479979.
@article{osti_1479979,
title = {Metastable states in the frustrated triangular compounds Ca3Co2-xMnxO6 and Ca3Co2O6},
author = {Kim, Jae Wook and Mun, Eun Deok and Ding, Xiaxin and Hansen, Anders and Jaime, Marcelo and Harrison, Neil and Yi, H. T. and Chai, Yisheng and Sun, Young and Cheong, Sang-Wook and Zapf, Vivien S.},
abstractNote = {The observation of unusual metastable behavior in Ca3Co2O6 remains an ongoing puzzle. When the magnetic field is increased at certain very slow rates, evenly spaced steps occur in the magnetization and other physical quantities as a function of magnetic field every 1.2 T. The ground state without steps is approached by slow relaxation processes over hours to days. It is a striking example of extremely slow dynamics arising from geometrical frustration in an otherwise clean and long-range ordered system, and its precise description remains controversial. Here we shed light on the mystery by reporting similar behavior in isostructural Ca3Co2-xMnxO6, albeit at magnetic field sweep rates that are six orders of magnitude faster than that in Ca3Co2O6. We observe these steps not only in the magnetization, but also in the magnetostriction, electric polarization, and magnetocaloric effect. Here, we present a study of metastable behavior in both compounds across seven orders of magnitude of magnetic field sweep rates using unique magnets at the National High Magnetic Field Laboratory. The metastable steps occur for intermediate ranges of magnetic field sweep rates, vanishing or evolving for the fastest and slowest sweep rates. Our data support that these metastable steps are an intrinsic feature of the three-dimensionally frustrated geometry of Ising spins in this structural family and thus narrow the number of applicable models.},
doi = {10.1103/PhysRevB.98.024407},
journal = {Physical Review B},
number = 2,
volume = 98,
place = {United States},
year = {2018},
month = {7}
}

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