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Title: Electronic phase separation and magnetic-field-induced phenomena in molecular multiferroic ( ND 4 ) 2 FeCl 5 · D 2 O

Electronic phase separation has been increasingly recognized as an important phenomenon in understanding many of the intriguing properties displayed in transition metal oxides. It is believed to produce fascinating functional properties in otherwise chemically homogenous electronic systems, e.g., colossal magnetoresistance manganites and high- T c cuprates. While many well-known electronically phase-separated systems are oxides, it has been argued that the same phenomenon should occur in other electronic systems with strong competing interactions. Here we report the observation of electronic phase separation in molecular (ND 4) 2FeCl 5 • D 2O, a type-II multiferroic. We show that two magnetic phases, one of which is commensurate and the other of which is incommensurate, coexist in this material. Here, their evolution under applied magnetic field produces emergent properties. In particular, our measurements reveal a field-induced exotic state linked to a direct transition from a paraelectric/paramagnetic phase to a ferroelectric/antiferromagnetic phase, a collective phenomenon that hasn't been seen in other magnetic multiferroics.
Authors:
ORCiD logo [1] ; ORCiD logo [1] ;  [2] ;  [2] ; ORCiD logo [1] ; ORCiD logo [1] ;  [1] ;  [3] ; ORCiD logo [1] ; ORCiD logo [1] ;  [2] ; ORCiD logo [4]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Univ. of Tennessee, Knoxville, TN (United States)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
Publication Date:
Report Number(s):
LA-UR-18-25205
Journal ID: ISSN 2469-9950; PRBMDO
Grant/Contract Number:
AC05-00OR22725; AC52-06NA25396
Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 98; Journal Issue: 5; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
OSTI Identifier:
1465065
Alternate Identifier(s):
OSTI ID: 1463380; OSTI ID: 1475361

Tian, Wei, Cao, H. B., Clune, Amanda J., Hughey, Kendall D., Hong, Tao, Yan, J. -Q., Agrawal, Harish K., Singleton, John, Sales, Brian C., Fishman, Randy Scott, Musfeldt, J. L., and Fernandez-Baca, Jaime A.. Electronic phase separation and magnetic-field-induced phenomena in molecular multiferroic (ND4)2FeCl5·D2O. United States: N. p., Web. doi:10.1103/PhysRevB.98.054407.
Tian, Wei, Cao, H. B., Clune, Amanda J., Hughey, Kendall D., Hong, Tao, Yan, J. -Q., Agrawal, Harish K., Singleton, John, Sales, Brian C., Fishman, Randy Scott, Musfeldt, J. L., & Fernandez-Baca, Jaime A.. Electronic phase separation and magnetic-field-induced phenomena in molecular multiferroic (ND4)2FeCl5·D2O. United States. doi:10.1103/PhysRevB.98.054407.
Tian, Wei, Cao, H. B., Clune, Amanda J., Hughey, Kendall D., Hong, Tao, Yan, J. -Q., Agrawal, Harish K., Singleton, John, Sales, Brian C., Fishman, Randy Scott, Musfeldt, J. L., and Fernandez-Baca, Jaime A.. 2018. "Electronic phase separation and magnetic-field-induced phenomena in molecular multiferroic (ND4)2FeCl5·D2O". United States. doi:10.1103/PhysRevB.98.054407.
@article{osti_1465065,
title = {Electronic phase separation and magnetic-field-induced phenomena in molecular multiferroic (ND4)2FeCl5·D2O},
author = {Tian, Wei and Cao, H. B. and Clune, Amanda J. and Hughey, Kendall D. and Hong, Tao and Yan, J. -Q. and Agrawal, Harish K. and Singleton, John and Sales, Brian C. and Fishman, Randy Scott and Musfeldt, J. L. and Fernandez-Baca, Jaime A.},
abstractNote = {Electronic phase separation has been increasingly recognized as an important phenomenon in understanding many of the intriguing properties displayed in transition metal oxides. It is believed to produce fascinating functional properties in otherwise chemically homogenous electronic systems, e.g., colossal magnetoresistance manganites and high-Tc cuprates. While many well-known electronically phase-separated systems are oxides, it has been argued that the same phenomenon should occur in other electronic systems with strong competing interactions. Here we report the observation of electronic phase separation in molecular (ND4)2FeCl5 • D2O, a type-II multiferroic. We show that two magnetic phases, one of which is commensurate and the other of which is incommensurate, coexist in this material. Here, their evolution under applied magnetic field produces emergent properties. In particular, our measurements reveal a field-induced exotic state linked to a direct transition from a paraelectric/paramagnetic phase to a ferroelectric/antiferromagnetic phase, a collective phenomenon that hasn't been seen in other magnetic multiferroics.},
doi = {10.1103/PhysRevB.98.054407},
journal = {Physical Review B},
number = 5,
volume = 98,
place = {United States},
year = {2018},
month = {8}
}