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Title: Magnetic field-induced ferroelectricity in S = 1/2 kagome staircase compound PbCu 3TeO 7

Abstract

Ni 3V 2O 8 is an archetypical multiferroic material with a kagome staircase structure of S = 1 (Ni 2+) spins whose complex interplay between spin ordering and ferroelectricity has been studied for more than a decade. Here in this paper, we report a new kagome staircase compound PbCu 3TeO 7 with Cu 2+ (S = 1/2) spins that exhibits two Néel temperatures at T N1 = 36 K and T N2 = 24 K, and a magnetic field (H)-induced electric polarization (P) below T N2. Pyroelectric and magnetoelectric current measurements in magnetic fields up to 60 T reveal that for H||c of ~ 8.3 T, a spin-flop transition induces a transverse P||a with a magnitude of 15 µC/m 2 below T N2. Furthermore, for a parallel configuration with P//H//a, two spin-flop transitions occur, the first at ~ 16 T with P//a of 14 µC/m 2, and the second at ~ 38 T, where P disappears. Monte Carlo simulations based on 12 major exchange interactions uncover that a sinusoidal amplitude modulation of the spins occurs along the b-axis below T N1 and an incommensurate, proper screw-type spin order occurs in the ac-plane below T N2. The simulation results show thatmore » P//a under H//c stems from a spin-flop transition facilitating an ab-plane-type spiral order, while the two successive spin-flop transitions for H//a result in spiral spin orders in the ab- and bc-planes. Based on the experimental and theoretical results, we establish field-induced magnetic and electric phase diagrams for the two H directions, demonstrating that the distorted kagome staircase structure with competing intra–interlayer interactions and lifted frustration creates a plethora of different noncollinear spin textures of S = 1/2 spins that in turn induce electric polarization.« less

Authors:
 [1];  [2];  [1];  [1];  [1];  [3];  [3];  [3];  [4];  [5];  [1]
  1. Seoul National Univ. (Korea, Republic of). Center for Novel States of Complex Materials Research and Inst. of Applied Physics, Dept. of Physics and Astronomy
  2. Seoul National Univ. (Korea, Republic of). Center for Novel States of Complex Materials Research and Inst. of Applied Physics, Dept. of Physics and Astronomy; Indian Inst. of Technology Tirupati, Tirupati (India)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  4. Southern Federal Univ., Rostov-on-Don (Russia). International Research Center
  5. Southern Federal Univ., Rostov-on-Don (Russia). Inst. of Physics
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC). Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1475334
Report Number(s):
LA-UR-17-27394
Journal ID: ISSN 2397-4648
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
npj Quantum Materials
Additional Journal Information:
Journal Volume: 3; Journal Issue: 1; Journal ID: ISSN 2397-4648
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; High Magnetic Field Science

Citation Formats

Yoo, Kyongjun, Koteswararao, B., Kang, Jeonghun, Shahee, Aga, Nam, Woohyun, Balakirev, Fedor F., Zapf, Vivien S., Harrison, Neil, Guda, Alexander, Ter-Oganessian, Nikita, and Kim, Kee Hoon. Magnetic field-induced ferroelectricity in S = 1/2 kagome staircase compound PbCu3TeO7. United States: N. p., 2018. Web. doi:10.1038/s41535-018-0117-0.
Yoo, Kyongjun, Koteswararao, B., Kang, Jeonghun, Shahee, Aga, Nam, Woohyun, Balakirev, Fedor F., Zapf, Vivien S., Harrison, Neil, Guda, Alexander, Ter-Oganessian, Nikita, & Kim, Kee Hoon. Magnetic field-induced ferroelectricity in S = 1/2 kagome staircase compound PbCu3TeO7. United States. doi:10.1038/s41535-018-0117-0.
Yoo, Kyongjun, Koteswararao, B., Kang, Jeonghun, Shahee, Aga, Nam, Woohyun, Balakirev, Fedor F., Zapf, Vivien S., Harrison, Neil, Guda, Alexander, Ter-Oganessian, Nikita, and Kim, Kee Hoon. Fri . "Magnetic field-induced ferroelectricity in S = 1/2 kagome staircase compound PbCu3TeO7". United States. doi:10.1038/s41535-018-0117-0. https://www.osti.gov/servlets/purl/1475334.
@article{osti_1475334,
title = {Magnetic field-induced ferroelectricity in S = 1/2 kagome staircase compound PbCu3TeO7},
author = {Yoo, Kyongjun and Koteswararao, B. and Kang, Jeonghun and Shahee, Aga and Nam, Woohyun and Balakirev, Fedor F. and Zapf, Vivien S. and Harrison, Neil and Guda, Alexander and Ter-Oganessian, Nikita and Kim, Kee Hoon},
abstractNote = {Ni3V2O8 is an archetypical multiferroic material with a kagome staircase structure of S = 1 (Ni2+) spins whose complex interplay between spin ordering and ferroelectricity has been studied for more than a decade. Here in this paper, we report a new kagome staircase compound PbCu3TeO7 with Cu2+ (S = 1/2) spins that exhibits two Néel temperatures at TN1 = 36 K and TN2 = 24 K, and a magnetic field (H)-induced electric polarization (P) below TN2. Pyroelectric and magnetoelectric current measurements in magnetic fields up to 60 T reveal that for H||c of ~ 8.3 T, a spin-flop transition induces a transverse P||a with a magnitude of 15 µC/m2 below TN2. Furthermore, for a parallel configuration with P//H//a, two spin-flop transitions occur, the first at ~ 16 T with P//a of 14 µC/m2, and the second at ~ 38 T, where P disappears. Monte Carlo simulations based on 12 major exchange interactions uncover that a sinusoidal amplitude modulation of the spins occurs along the b-axis below TN1 and an incommensurate, proper screw-type spin order occurs in the ac-plane below TN2. The simulation results show that P//a under H//c stems from a spin-flop transition facilitating an ab-plane-type spiral order, while the two successive spin-flop transitions for H//a result in spiral spin orders in the ab- and bc-planes. Based on the experimental and theoretical results, we establish field-induced magnetic and electric phase diagrams for the two H directions, demonstrating that the distorted kagome staircase structure with competing intra–interlayer interactions and lifted frustration creates a plethora of different noncollinear spin textures of S = 1/2 spins that in turn induce electric polarization.},
doi = {10.1038/s41535-018-0117-0},
journal = {npj Quantum Materials},
issn = {2397-4648},
number = 1,
volume = 3,
place = {United States},
year = {2018},
month = {9}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Figures / Tables:

Fig. 1 Fig. 1: Crystal structure and magnetic susceptibility of PbCu3TeO7 single crystals. Crystal structures viewed along a the b-axis with all atoms and along b the a-direction showing the staircase kagome structure with spine Cu ions (green) and cross-tie Cu ions (blue). c Possible intralayer exchange interactions denoted from J1 tomore » J8 in the order of the distance. d Temperature-dependent magnetic susceptibility data along each field direction« less

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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.