Ferromagnetic Behavior of (Fe1-yZny)2Mo3O8 (0≤y≤1) Induced by Nonmagnetic Zn Substitution

Nakayama, Shungo; Nakamura, Ryouta; Akaki, Mitsuru; Akahoshi, Daisuke; Kuwahara, H.

doi:10.1143/jpsj.80.104706

Cited by 19 publications

(23 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2. (a, b) T dependence of (a) y ≥ 0.125 in accordance with the previous study on the polycrystalline samples [24].…”

Section: Resultssupporting

confidence: 91%

Doping-Tunable Ferrimagnetic Phase with Large Linear Magnetoelectric Effect in a Polar MagnetFe2Mo3O8
Kurumaji
¹
,
Ishiwata
²
,
Tokura
³

2015
Phys. Rev. X
83
9
102
0
View full text Add to dashboard Cite

The magnetoelectric (ME) effect, i.e., cross control of magnetization (electric polarization) by an external electric (magnetic) field, may introduce a new design principle for novel spin devices. To enhance the ME signal, control of a phase competition has recently been revealed as a promising approach. Here, we report the successful chemical-doping control of the distinct ME phases in a polar magnet Fe 2 Mo 3 O 8 , in which an antiferromagnetic state is competing with a ferrimagnetic state. We demonstrate that Zn doping stabilizes the metamagnetic state to realize the spontaneous ferrimagnetic state and varies the ME coefficients from large negative to large positive values; for instance, the diagonal component of the ME coefficients under the magnetic field perpendicular to the polar axis varies from −142 ps=m to 107 ps=m by doping Zn from 12.5% to 50%. This remarkable doping control of the ME property originates from coexisting distinct ME mechanisms, which are selectively tunable by substituting one of the two distinct magnetic sites in the unit cell with nonmagnetic Zn.

show abstract

“…2. (a, b) T dependence of (a) y ≥ 0.125 in accordance with the previous study on the polycrystalline samples [24].…”

Section: Resultssupporting

confidence: 91%

Doping-Tunable Ferrimagnetic Phase with Large Linear Magnetoelectric Effect in a Polar MagnetFe2Mo3O8
Kurumaji
¹
,
Ishiwata
²
,
Tokura
³

2015
Phys. Rev. X
83
9
102
0
View full text Add to dashboard Cite

show abstract

“…Alternatively, the FM state is stabilized also by substitution of more than 12.5 % of Fe with Zn [24,26,27]. Coexistence of spontaneous polarization and magnetic order below the transition temperature allows strong ME coupling and large linear ME coefficients in both the in-plane and out-ofplane components, which promises the characteristic spin wave excitation responding to ac electric/magnetic field of light.…”

mentioning

confidence: 99%

Electromagnon resonance in a collinear spin state of the polar antiferromagnet Fe2Mo3O8

et al. 2017

View full text Add to dashboard Cite

Magnetic excitations are investigated for a hexagonal polar magnet Fe2Mo3O8 by terahertz spectroscopy.We observed magnon modes including an electric-field active magnon, electromagnon, in the collinear antiferromagnetic phase with spins parallel to the c axis. We unravel the nature of these excitations by investigating the correlation between the evolution of the mode profile and the magnetic transition from antiferromagnetic to ferrimagnetic order induced by magnetic field or Zn-doping. We propose that the observed electromagnon mode involves the collective precession of the spins with oscillating in-plane electric polarization through the mechanism of the linear magnetoelectric effect. Fe2Mo3O8 forms a hexagonal lattice belonging to a polar space group 4 P63mc ( Fig. 1(a)). There exist two types of magnetic site for Fe 2+ Alternatively, the FM state is stabilized also by substitution of more than 12.5 % of Fe with Zn [24,26,27]. Coexistence of spontaneous polarization and magnetic order below the transition temperature allows strong ME coupling and large linear ME coefficients in both the in-plane and out-ofplane components, which promises the characteristic spin wave excitation responding to ac electric/magnetic field of light.Single crystals of Fe2Mo3O8 and (Zn0.125Fe0.875)2Mo3O8 were grown by chemical vapor transport reaction as described in Refs. [28,29] from the stoichiometric mixture of MoO2, Fe, Fe2O3, and ZnO. Samples with ab-plane and ac-plane cut, whose dimensions are typically 2 x 2 mm 2 , were prepared.The time-domain terahertz spectroscopy was employed to measure the refractive indices in a frequency range of 0.5 -2.8 THz and the details about the experimental setup and procedures are described in Ref. [30]. Laser pulses with 100-fs duration from a Ti: sapphire laser were split into two paths 5 to generate and detect the wave form of terahertz pulses. A ZnTe (110) crystal and a dipole antenna were used for generation and detection of terahertz pulses, respectively. The Hdc was applied to the sample with a superconducting magnet in Voigt geometry, i.e., a light propagation vector k  perpendicular to Hdc. electromagnon, because it can be excited by the ⊥ (Fig. 1(e)) but not by ⊥ ( Fig. 1(f)), while MM1 is active for ⊥ (not with ⊥ ), indicating its magnetic-dipole (M1) active nature. To check the correlation between the mode profile and the magnetic order, we also measured the spectra for the collinear ferrimagnetic phase in the doped sample (y = 0.125) (Figs. 1(g)-(i)). This composition shows the FM state even at zero field ( Fig. 1(c)). A single resonance peak is observed around 2.6 THz (MM2) (Fig. 1(g) and 1(i)), while no discernible resonance structure is seen around 1.2 THz.Thus, the electromagnon resonance is absent ( Fig. 1(h)) in the current energy window, while the MM2 is active for ⊥ ( Fig. 1(i)) similarly to the MM1. Here, d is the thickness of the sample, t the transmittance, and  the angular frequency of light. t0 is assumed to be a background due to flat absorption. We def...

show abstract

“…Two different M polyhedra, the MO 4 tetrahedron and MO 6 octahedron, in the kamiokite structure suggest a possibility of cation ordering of the divalent M cations in a solid solution having an intermediate composition among the end -members of M 2 Mo 3 O 8 . Indeed, Nakayama et al (2011) Sasaki et al (1985).…”

Section: Discussionmentioning

confidence: 99%

“…The sheet structure stacks with the MoO 6 octahedral sheet alternately along the c -axis. The M 2 Mo 3 O 8 compounds have been drawing attention in the solid state physics owing to their wide variety of magnetic properties (e.g., McAlister and Strobel, 1983;Abe et al, 2010;Nakayama et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Iseite, Mn2Mo3O8, a new mineral from Ise, Mie Prefecture, Japan

Nishio–Hamane

Tomita

Minakawa

et al. 2013

Journal of Mineralogical and Petrological Sciences

View full text Add to dashboard Cite

Iseite, Mn 2 Mo 3 O 8 , a new mineral that is a Mn -dominant analogue of kamiokite, is found in the stratiform ferromanganese deposit, Shobu area, Ise City, Mie Prefecture, Japan. It is the first mineral species that includes both Mn and Mo as essential constituents. Iseite is iron -black in color and has a submetallic luster. It occurs as aggregates up to about 1 mm in size made of minute crystals (<20 μm). Iseite has a zoned structure closely associated with undetermined Mn -Fe -Mo oxide minerals with hexagonal forms, and it occasionally coexists with small amounts of powellite. Its Mohs hardness is 4 -5, and its calculated density is 5.85 g/cm , and Z = 2. The Rietveld refinement using synchrotron radiation (λ = 0.413 Å) powder XRD data converges to R wp = 3.11%, and confirms two independent Mn sites-tetrahedral and octahedral-in the crystal structure of iseite, indicating the structure formula Mn

show abstract

Ferromagnetic Behavior of (Fe_1-yZn_y)₂Mo₃O₈ (0≤y≤1) Induced by Nonmagnetic Zn Substitution

Cited by 19 publications

References 13 publications

Doping-Tunable Ferrimagnetic Phase with Large Linear Magnetoelectric Effect in a Polar MagnetFe2Mo3O8
Kurumaji
¹
,
Ishiwata
²
,
Tokura
³

2015
Phys. Rev. X
83
9
102
0
View full text Add to dashboard Cite

Doping-Tunable Ferrimagnetic Phase with Large Linear Magnetoelectric Effect in a Polar MagnetFe2Mo3O8
Kurumaji
¹
,
Ishiwata
²
,
Tokura
³

2015
Phys. Rev. X
83
9
102
0
View full text Add to dashboard Cite

Electromagnon resonance in a collinear spin state of the polar antiferromagnet Fe2Mo3O8

Iseite, Mn2Mo3O8, a new mineral from Ise, Mie Prefecture, Japan

Contact Info

Product

Resources

About

Ferromagnetic Behavior of (Fe1-yZny)2Mo3O8 (0≤y≤1) Induced by Nonmagnetic Zn Substitution

Cited by 19 publications

References 13 publications

Doping-Tunable Ferrimagnetic Phase with Large Linear Magnetoelectric Effect in a Polar MagnetFe2Mo3O8Kurumaji1, Ishiwata2, Tokura3 2015Phys. Rev. X8391020View full textAdd to dashboardCite

Doping-Tunable Ferrimagnetic Phase with Large Linear Magnetoelectric Effect in a Polar MagnetFe2Mo3O8Kurumaji1, Ishiwata2, Tokura3 2015Phys. Rev. X8391020View full textAdd to dashboardCite

Electromagnon resonance in a collinear spin state of the polar antiferromagnet Fe2Mo3O8

Iseite, Mn2Mo3O8, a new mineral from Ise, Mie Prefecture, Japan

Contact Info

Product

Resources

About

Ferromagnetic Behavior of (Fe_1-yZn_y)₂Mo₃O₈ (0≤y≤1) Induced by Nonmagnetic Zn Substitution

Doping-Tunable Ferrimagnetic Phase with Large Linear Magnetoelectric Effect in a Polar MagnetFe2Mo3O8
Kurumaji
¹
,
Ishiwata
²
,
Tokura
³

2015
Phys. Rev. X
83
9
102
0
View full text Add to dashboard Cite

Doping-Tunable Ferrimagnetic Phase with Large Linear Magnetoelectric Effect in a Polar MagnetFe2Mo3O8
Kurumaji
¹
,
Ishiwata
²
,
Tokura
³

2015
Phys. Rev. X
83
9
102
0
View full text Add to dashboard Cite