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Title: Spin-lattice coupling mediated multiferroicity in (ND 4) 2FeCl 5 • D 2O

Abstract

In this paper, we report a neutron diffraction study of the multiferroic mechanism in (ND 4) 2FeCl 5 • D 2O, a molecular compound that exhibits magnetically induced ferroelectricity. This material exhibits two successive magnetic transitions on cooling: a long-range order transition to an incommensurate (IC) collinear sinusoidal spin state at T N = 7.3 K, followed by a second transition to an IC cycloidal spin state at T FE = 6.8 K, the latter of which is accompanied by spontaneous ferroelectric polarization. The cycloid structure is strongly distorted by spin-lattice coupling, as evidenced by the observations of both odd and even higher-order harmonics associated with the cycloid wave vector, and a weak commensurate phase that coexists with the IC phase. The second-order harmonic appears at T FE, thereby providing unambiguous evidence that the onset of the electric polarization is accompanied by a lattice modulation due to spin-lattice interaction. The neutron results, in conjunction with the negative thermal expansion and large magnetostriction observed, indicate that spin-lattice coupling plays a critical role in the ferroelectric mechanism of (ND 4) 2FeCl 5 • D 2O.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); The Univ. of Tennessee, Knoxville, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1335305
Alternate Identifier(s):
OSTI ID: 1334687
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 94; Journal Issue: 21; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Tian, Wei, Cao, Huibo, Wang, Jincheng, Ye, Feng, Matsuda, Masaaki, Yan, Jiaqiang, Liu, Yaohua, Garlea, Vasile O., Agrawal, Harish K., Chakoumakos, Bryan C., Sales, Brian C., Fishman, Randy Scott, and Fernandez-Baca, Jaime A. Spin-lattice coupling mediated multiferroicity in (ND4)2FeCl5 • D2O. United States: N. p., 2016. Web. doi:10.1103/PhysRevB.94.214405.
Tian, Wei, Cao, Huibo, Wang, Jincheng, Ye, Feng, Matsuda, Masaaki, Yan, Jiaqiang, Liu, Yaohua, Garlea, Vasile O., Agrawal, Harish K., Chakoumakos, Bryan C., Sales, Brian C., Fishman, Randy Scott, & Fernandez-Baca, Jaime A. Spin-lattice coupling mediated multiferroicity in (ND4)2FeCl5 • D2O. United States. doi:10.1103/PhysRevB.94.214405.
Tian, Wei, Cao, Huibo, Wang, Jincheng, Ye, Feng, Matsuda, Masaaki, Yan, Jiaqiang, Liu, Yaohua, Garlea, Vasile O., Agrawal, Harish K., Chakoumakos, Bryan C., Sales, Brian C., Fishman, Randy Scott, and Fernandez-Baca, Jaime A. Wed . "Spin-lattice coupling mediated multiferroicity in (ND4)2FeCl5 • D2O". United States. doi:10.1103/PhysRevB.94.214405. https://www.osti.gov/servlets/purl/1335305.
@article{osti_1335305,
title = {Spin-lattice coupling mediated multiferroicity in (ND4)2FeCl5 • D2O},
author = {Tian, Wei and Cao, Huibo and Wang, Jincheng and Ye, Feng and Matsuda, Masaaki and Yan, Jiaqiang and Liu, Yaohua and Garlea, Vasile O. and Agrawal, Harish K. and Chakoumakos, Bryan C. and Sales, Brian C. and Fishman, Randy Scott and Fernandez-Baca, Jaime A.},
abstractNote = {In this paper, we report a neutron diffraction study of the multiferroic mechanism in (ND4)2FeCl5 • D2O, a molecular compound that exhibits magnetically induced ferroelectricity. This material exhibits two successive magnetic transitions on cooling: a long-range order transition to an incommensurate (IC) collinear sinusoidal spin state at TN = 7.3 K, followed by a second transition to an IC cycloidal spin state at TFE = 6.8 K, the latter of which is accompanied by spontaneous ferroelectric polarization. The cycloid structure is strongly distorted by spin-lattice coupling, as evidenced by the observations of both odd and even higher-order harmonics associated with the cycloid wave vector, and a weak commensurate phase that coexists with the IC phase. The second-order harmonic appears at TFE, thereby providing unambiguous evidence that the onset of the electric polarization is accompanied by a lattice modulation due to spin-lattice interaction. The neutron results, in conjunction with the negative thermal expansion and large magnetostriction observed, indicate that spin-lattice coupling plays a critical role in the ferroelectric mechanism of (ND4)2FeCl5 • D2O.},
doi = {10.1103/PhysRevB.94.214405},
journal = {Physical Review B},
number = 21,
volume = 94,
place = {United States},
year = {Wed Dec 07 00:00:00 EST 2016},
month = {Wed Dec 07 00:00:00 EST 2016}
}

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Works referenced in this record:

Reticular synthesis and the design of new materials
journal, June 2003

  • Yaghi, Omar M.; O'Keeffe, Michael; Ockwig, Nathan W.
  • Nature, Vol. 423, Issue 6941, p. 705-714
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