Huge magnetocrystalline anisotropy in cubic rare earth-Fe2 compounds

Clark, A. E.; Belson, Henry S.; Tamagawa, Nobuaki

doi:10.1016/0375-9601(72)90753-0

Cited by 66 publications

(18 citation statements)

References 6 publications

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“…3a ). Remarkably, the c -axis lattice parameter changes abruptly around 380 K with a thermal hysteresis of ~ 25 K. Th e lattice parameter is changed by ~ 0.2 % , which is a very large value comparable with those of giant magnetostrictive materials such as rare earth alloys 34,35 . Furthermore, it is signifi cantly larger than hexagonal manganites ( ~ 0.02 % ) where a giant magnetoelastic coupling has been reported 36 .…”

Section: Resultsmentioning

confidence: 91%

Concurrent transition of ferroelectric and magnetic ordering near room temperature

Jung

et al. 2011

Nat Commun

154

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Strong spin-lattice coupling in condensed matter gives rise to intriguing physical phenomena such as colossal magnetoresistance and giant magnetoelectric effects. The phenomenological hallmark of such a strong spin-lattice coupling is the manifestation of a large anomaly in the crystal structure at the magnetic transition temperature. Here we report that the magnetic N é el temperature of the multiferroic compound BiFeO 3 is suppressed to around room temperature by heteroepitaxial misfi t strain. Remarkably, the ferroelectric state undergoes a fi rst-order transition to another ferroelectric state simultaneously with the magnetic transition temperature. Our fi ndings provide a unique example of a concurrent magnetic and ferroelectric transition at the same temperature among proper ferroelectrics, taking a step toward room temperature magnetoelectric applications.

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Section: Resultsmentioning

confidence: 91%

Concurrent transition of ferroelectric and magnetic ordering near room temperature

Jung

et al. 2011

Nat Commun

154

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“…It is noted that the magnetostriction at x=0.1 is slightly larger than that of the Pr-free alloys, which is due to the cause that the magnetostriction of PrFe 2 is larger than that of TbFe 2 and DyFe 2 . Just as Tang et al [10] studied that the first degree anisotropy of Dy 0.9−x Pr xTb 0.1 Fe 2 alloys decreases as Pr content increases, from Figure 3, it is found that the magnetostriction of Tb 0.3 -Dy 0.6 Pr 0.1 (Fe 0.9 Al 0.1 ) 1.95 alloys is more easily saturated in an applied field, implying that the magnetocrystalline anisotropy decreases, which is in good agreement with the results of the magnetization measurements. Therefore, this composition would become very valuable giant magnetostriction materials for application.…”

Section: Resultsmentioning

confidence: 94%

“…Clark et al [10] investigated the magnetocrystalline anisotropy of RFe 2 series and the results show that the compensating multielement composition of RFe 2 (R is the two or three elements) retains large magnetostriction and decreasing magnetocrystalline anisotropy, which is composed of these RFe 2 with the same magnetostriction sign and opposite magnetocrystalline anisotropy. Tang [11] and Wang [12] groups investigated the effect of Pr substitution for Dy on the anisotropy, magnetostriction and magnetism of the various RFe 2 alloys.…”

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confidence: 99%

Magnetic, magetostrictive properties, spin reorientation and Mössbauer effect of Tb0.3Dy0.7−x Pr x (Fe0.9Al0.1)1.95 alloys

Zheng

Zhang

Fan

et al. 2009

Sci. China Ser. G-Phys. Mech. Astron.

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The effect of Pr substitution for Dy on the magnetic and magnetostrictive properties, anisotropy, spin reorientation and Mössbauer effect of a series of Tb 0.3 Dy 0.7−x Pr x (Fe 0.9 Al 0.1 ) 1.95 (x=0, 0.1, 0.20, 0.25, 0.30, 0.35) alloys at room temperature have been investigated. It was found that a small amount of Pr substitution is beneficial to a decrease in the magnetocrystalline anisotropy for the Tb 0.3 Dy 0.7−x Pr x (Fe 0.9 Al 0.1 ) 1.95 alloys. The magnetostriction decreases drastically with increasing x and the magnetostrictive effect disappears for x>0.2. However, the magnetostriction exhibits a slightly bigger value at x=0.1 than the free alloys and is saturated more easily with the magnetic field H. The saturation magnetization and Curie temperature decrease monotonously, but the spontaneous magnetostriction increases linearly with increasing x, whereas the spin reorientation temperature increases first, then decreases rapidly and reaches the maximum at x=0.1. The analysis of Mössbauer spectra indicated that the easy magnetization direction in the {110} plane deviates slightly from the main axis of symmetry with the Pr concentration x, namely spin reorientation. Compared with Al substitution for Fe, the effect of Pr substitution for Dy on spin reorientation is relatively small. The hyperfine field increases with Pr concentration increasing, and the isomer shifts and the quadrupole splitting (QS) show weak concentration dependence. magnetostriction, anisotropy, spin reorientation, MössbauerThe pseudobinary rare-earth iron alloy Tb 0.3 Dy 0.7 Fe 2 (commercially known as Terfenol-D) is an excellent magnetostrictive material, which can be used as ultrasonic transducers and micro-actuators with giant magnetostrition and relatively low magnetocrystalline anisotropy [1] . However, there is some limitation in its application because of its low tolerance to tensile and shear forces, low electrical resistivity and relatively high saturation field. Many research works have focused on substituting Fe with other elements in attempt to improve the magnetic and magnetostrictive properties in the Tb 0.3 Dy 0.7 (Fe 1−x T x ) 2 (T = Mn, Co, Ni, Ga, Al, B, Be, etc. ) alloys [2][3][4][5] in order to improve its application properties.Based on these researches, Al is regarded as an ideal substitution for Fe. The application properties of Tb 0.3 Dy 0.7 (Fe 0.9 Al 0.1 ) 1.95 alloys are excellent [5][6][7][8] because the addition of Al to Fe increases resistivity and ductility and decreases anisotropy, but it is saturated magnetostriction that greatly decreases. On the basis of retaining the good application properties, we anticipate that other elements' substitution for Tb or Dy enhances the

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“…Among the various magnetostrictive materials RFe 2 Laves phase compounds exhibit huge (up to 10 −3 ) magnetostrictive strain at room temperature, which is important for technological reasons (Clark, Tamagawa and Belson, 1972). Among the RFe 2 compounds single crystals of TbFe 2 , ErFe 2 , and TmFe 2 exhibit [111] as the easy magnetization direction, whereas for DyFe 2 and HoFe 2 the easy magnetization direction is [100].…”

Section: Binary Rfe 2 Compoundsmentioning

confidence: 99%

Crystal Growth of Magnetic Materials

Behr

Löser

2007

Handbook of Magnetism and Advanced Magnetic Materials

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In this chapter, the various methods for crystal growth of magnetic materials are summarized and principles of choosing the appropriate growth method, which depends on phase diagram features of the alloy system, the required size, physical, and chemical perfection of single crystalline samples, are briefly discussed. The crystal growth of the following classes of materials is considered: soft magnetic pure metals and alloys, highly anisotropic compounds for high‐density magnetic recording media, rare earth–transition metal compounds for high‐performance permanent magnets, high‐magnetostrictive intermetallic compounds and ferromagnetic shape memory alloys for magnetomechanical applications, magnetocaloric materials, selected intermetallic compounds for spintronics, multiferroic materials, and some other less‐common magnetic compounds.

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Huge magnetocrystalline anisotropy in cubic rare earth-Fe2 compounds

Cited by 66 publications

References 6 publications

Concurrent transition of ferroelectric and magnetic ordering near room temperature

Concurrent transition of ferroelectric and magnetic ordering near room temperature

Magnetic, magetostrictive properties, spin reorientation and Mössbauer effect of Tb0.3Dy0.7−x Pr x (Fe0.9Al0.1)1.95 alloys

Crystal Growth of Magnetic Materials

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