Temperature- and magnetic-field-induced change of electric polarization in a multiferroic Mn0:93Co0:07W0:93O 4-δ single crystal

Li Qin Yan, Bumsung Lee, Sae Hwan Chun, Ingyu Kim, Jaiho Chung, Sung Baek Kim, Ju Young Park, Suk Ho Lee, Yisheng Chai, Kee Hoon Kim

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Abstract

We have investigated magnetic and electrical properties in a multiferroic Mn0:93Co0:07W0:93O4-δ single crystal grown using the flux method, in which spiral spin orderings are known to be stabilized and thus magnetically induced electric polarization develops consistent with the spin current model. Upon temperature being lowered, two successive magnetic transitions appeared at Tn1 = 13:0 and TN2 = 12:2 K. While there was no development of ferroelectric polarization P below T n1, a dominant P along the a-axis (Pa) and a small P along the b-axis (Pb) clearly developed below Tn2, suggesting the stabilization of a spiral order with its basal plane close to the ac-plane. The magnetization measurements also support the existence of the spiral order with ac-basal plane below TN2 by exhibiting the largest spin susceptibility along the b-axis and the smaller ones along the a- and c-axes. Upon further lowering temperature below T* - 10:1 K, P a starts to decrease significantly accompanied by a small increase of Pb while the magnetic susceptibility along the c-axis gradually becomes the largest and concomitantly shows a saturation. We have also found that the magnitude of Pa or Pb can be controlled smoothly at low temperatures as a function of magnetic field less than 9 T. These findings show that the magnitude and direction of the electric polarization vector in Mn0:93Co0:07W0:93O 4-δ can be varied as a function of temperature and magnetic field via the changes in the properties of the associated spiral phases.

Original languageEnglish
Article number094708
JournalJournal of the Physical Society of Japan
Volume82
Issue number9
DOIs
Publication statusPublished - 2013 Sep 1

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temperature distribution
single crystals
polarization
magnetic fields
magnetic permeability
stabilization
electrical properties
magnetic properties
saturation
magnetization
temperature

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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Temperature- and magnetic-field-induced change of electric polarization in a multiferroic Mn0:93Co0:07W0:93O 4-δ single crystal. / Yan, Li Qin; Lee, Bumsung; Chun, Sae Hwan; Kim, Ingyu; Chung, Jaiho; Kim, Sung Baek; Park, Ju Young; Lee, Suk Ho; Chai, Yisheng; Kim, Kee Hoon.

In: Journal of the Physical Society of Japan, Vol. 82, No. 9, 094708, 01.09.2013.

Research output: Contribution to journalArticle

Yan, Li Qin ; Lee, Bumsung ; Chun, Sae Hwan ; Kim, Ingyu ; Chung, Jaiho ; Kim, Sung Baek ; Park, Ju Young ; Lee, Suk Ho ; Chai, Yisheng ; Kim, Kee Hoon. / Temperature- and magnetic-field-induced change of electric polarization in a multiferroic Mn0:93Co0:07W0:93O 4-δ single crystal. In: Journal of the Physical Society of Japan. 2013 ; Vol. 82, No. 9.
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abstract = "We have investigated magnetic and electrical properties in a multiferroic Mn0:93Co0:07W0:93O4-δ single crystal grown using the flux method, in which spiral spin orderings are known to be stabilized and thus magnetically induced electric polarization develops consistent with the spin current model. Upon temperature being lowered, two successive magnetic transitions appeared at Tn1 = 13:0 and TN2 = 12:2 K. While there was no development of ferroelectric polarization P below T n1, a dominant P along the a-axis (Pa) and a small P along the b-axis (Pb) clearly developed below Tn2, suggesting the stabilization of a spiral order with its basal plane close to the ac-plane. The magnetization measurements also support the existence of the spiral order with ac-basal plane below TN2 by exhibiting the largest spin susceptibility along the b-axis and the smaller ones along the a- and c-axes. Upon further lowering temperature below T* - 10:1 K, P a starts to decrease significantly accompanied by a small increase of Pb while the magnetic susceptibility along the c-axis gradually becomes the largest and concomitantly shows a saturation. We have also found that the magnitude of Pa or Pb can be controlled smoothly at low temperatures as a function of magnetic field less than 9 T. These findings show that the magnitude and direction of the electric polarization vector in Mn0:93Co0:07W0:93O 4-δ can be varied as a function of temperature and magnetic field via the changes in the properties of the associated spiral phases.",
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author = "Yan, {Li Qin} and Bumsung Lee and Chun, {Sae Hwan} and Ingyu Kim and Jaiho Chung and Kim, {Sung Baek} and Park, {Ju Young} and Lee, {Suk Ho} and Yisheng Chai and Kim, {Kee Hoon}",
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T1 - Temperature- and magnetic-field-induced change of electric polarization in a multiferroic Mn0:93Co0:07W0:93O 4-δ single crystal

AU - Yan, Li Qin

AU - Lee, Bumsung

AU - Chun, Sae Hwan

AU - Kim, Ingyu

AU - Chung, Jaiho

AU - Kim, Sung Baek

AU - Park, Ju Young

AU - Lee, Suk Ho

AU - Chai, Yisheng

AU - Kim, Kee Hoon

PY - 2013/9/1

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N2 - We have investigated magnetic and electrical properties in a multiferroic Mn0:93Co0:07W0:93O4-δ single crystal grown using the flux method, in which spiral spin orderings are known to be stabilized and thus magnetically induced electric polarization develops consistent with the spin current model. Upon temperature being lowered, two successive magnetic transitions appeared at Tn1 = 13:0 and TN2 = 12:2 K. While there was no development of ferroelectric polarization P below T n1, a dominant P along the a-axis (Pa) and a small P along the b-axis (Pb) clearly developed below Tn2, suggesting the stabilization of a spiral order with its basal plane close to the ac-plane. The magnetization measurements also support the existence of the spiral order with ac-basal plane below TN2 by exhibiting the largest spin susceptibility along the b-axis and the smaller ones along the a- and c-axes. Upon further lowering temperature below T* - 10:1 K, P a starts to decrease significantly accompanied by a small increase of Pb while the magnetic susceptibility along the c-axis gradually becomes the largest and concomitantly shows a saturation. We have also found that the magnitude of Pa or Pb can be controlled smoothly at low temperatures as a function of magnetic field less than 9 T. These findings show that the magnitude and direction of the electric polarization vector in Mn0:93Co0:07W0:93O 4-δ can be varied as a function of temperature and magnetic field via the changes in the properties of the associated spiral phases.

AB - We have investigated magnetic and electrical properties in a multiferroic Mn0:93Co0:07W0:93O4-δ single crystal grown using the flux method, in which spiral spin orderings are known to be stabilized and thus magnetically induced electric polarization develops consistent with the spin current model. Upon temperature being lowered, two successive magnetic transitions appeared at Tn1 = 13:0 and TN2 = 12:2 K. While there was no development of ferroelectric polarization P below T n1, a dominant P along the a-axis (Pa) and a small P along the b-axis (Pb) clearly developed below Tn2, suggesting the stabilization of a spiral order with its basal plane close to the ac-plane. The magnetization measurements also support the existence of the spiral order with ac-basal plane below TN2 by exhibiting the largest spin susceptibility along the b-axis and the smaller ones along the a- and c-axes. Upon further lowering temperature below T* - 10:1 K, P a starts to decrease significantly accompanied by a small increase of Pb while the magnetic susceptibility along the c-axis gradually becomes the largest and concomitantly shows a saturation. We have also found that the magnitude of Pa or Pb can be controlled smoothly at low temperatures as a function of magnetic field less than 9 T. These findings show that the magnitude and direction of the electric polarization vector in Mn0:93Co0:07W0:93O 4-δ can be varied as a function of temperature and magnetic field via the changes in the properties of the associated spiral phases.

KW - Ferroelectricity

KW - MnWO

KW - Multiferroicity

KW - Spiral magnetism

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