Anisotropy of the magnetostriction of V, Mo and W. by Tat Luen Tam

Cover of: Anisotropy of the magnetostriction of V, Mo and W. | Tat Luen Tam

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Written in English

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  • Physics Theses

Edition Notes

Thesis (M.Sc.), Dept. of Physics, University of Toronto.

Book details

ContributionsFawcett, E. (supervisor)
The Physical Object
Pagination26 p. + diagrams
Number of Pages26
ID Numbers
Open LibraryOL18925897M

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Single crystals of a number of binary iron‐base alloys were grown, fabricated, and tested for magnetic anisotropy (K1) and magnetostriction (λ and λ). Inat the first International Conference on Physics held in Paris, Nagaoka gave an invited lecture on magnetostriction at the request of Guillaume, the discoverer of Invar (Chap.

Thus, the pioneering work on magnetic anisotropy and magnetostriction was carried out in Japan at a very early stage in the history of modern by: 4. Thermodynamic theory. The magnetocrystalline anisotropy energy is generally represented as an expansion in powers of the direction cosines of the magnetization.

The magnetization vector can be written M = M s (α,β,γ), where M s is the saturation e of time reversal symmetry, only even powers of the cosines are allowed. The nonzero terms in the expansion depend on the. ANISOTROPY AND MAGNETOSTRICTION [7 SHORT PAPERS] (Pamphlet) Paperback – January 1, by P.M.

(Chairman) Levy (Author) See all formats and editions Hide other formats and editions. Price New from Used from Pamphlet Author: P.M. (Chairman) Levy. Magnetostriction Anisotropy and Rotational Magnetostriction of a Nonoriented Electrical Steel Article (PDF Available) in IEEE Transactions on Magnetics 46(2) - March with Reads.

ELSEVIER Journal of Magnetism and Magnetic Materials () ~4 Journal of amnadgn etism magnetic materials Invited paper First-principles determinations of magneto-crystalline anisotropy and magnetostriction in bulk and thin-film transition metals R.Q.

Wua'*, L.J. Chena, A. Shickb, A.J. Freemanb ~Department of Physics and Astronom).Cited by: Magnetic Anisotropy. The theory of ferro- and ferrimagnetism is based on electronic exchange forces.

These forces are so strong that these material are spontaneously magnetized, even in the absence of an applied field. Yet, in the laboratory we need to apply magnetic fields to saturate a ferro- or ferrimagnetic material.

Magnetostriction. The standard theory of magnetocrystalline anisotropy for a rigid ferromagnetic body, with cubic symmetry, makes use of a `zero strain' anisotropy constant K(sub 1). If the effect of magnetostriction is taken into account, this constant must be replaced by a `zero stress' anisotropy constant K'(sub 1) by a term involving magnetostriction.

This spontaneous volume magnetostriction, ω s, has a maximum value at zero temperature, ω s0 =(ΔV/V) T =0, corresponding to the area between the data and the reference curve in Fig.

1(a). Figure 1(c) shows that the shear modulus, G, starts to soften at T C and then displays the temperature-independent Elinvar behavior.

Magnetism, magneto-crystalline anisotropy, magnetostriction and MOKE at surfaces and interfaces. Arthur J Freeman, we have recently investigated important phenomena such as magnetic crystalline anisotropy (MCA), magnetostriction, and magneto-optical Kerr effects (MOKE) in various transition metal systems using the highly precise local Cited by: 8.

The magnetostriction constant ë is as high as ppm. The value of the anisotropy constant K1 and the value of the susceptibility were small and influenced by the magnetoelastic energy. The symmetry of the torque curves changes from 2-fold to 4-fold with increasing external field which indicates the existence of a second uniaxial : Tong Ren.

Magneto-elastic Anisotropy. The magneto-elastic effect arises from the spin-orbit interaction. The spin moments are coupled to the lattice via the orbital electrons.

If the lattice is changed by strain the distances between the magnetic atoms is altered and hence the interaction energies are changed. This produces magneto-elastic anisotropy. From magnetization (M) and magnetostriction (λ) measurements as a function of magnetic field and stress, the temperatures of anisotropy compensation, Tm, for technologically important TbxDy1−x(Fe1−yTy) [T=Co,Mn (≤x≤) (0≤y≤)] were determined.

Measurements of M and λ encompassing Tm were made under compressive stresses from to 36 MPa and for temperatures Cited by: Two techniques of measurements of thin film magnetostriction are compared: direct, when changes of the substrate curvature caused by the film magnetization are controlled, and inverse ("indirect"), when the modification of the magnetic anisotropy induced by the substrate deformation (usually bending) is measured.

We demonstrate how both the elastic strength of the substrate and the effective. Magnetostriction of an Fe 94 Si 6 (at. %) single-crystal is investigated under rotating magnetic fields and the behavior is analyzed by using a modified model of coherent rotation of the magnetization.

The Fe-Si() single-crystal film has the magnetic easy axes lying along <> and shows a four-fold anisotropy with the magnetic anisotropy field and the coercivity of and 5 Oe Cited by: 3. The influence of magnetic anisotropy on magnetostriction forces and vibration in three-phase three-limb transformers Lee E.W., Magnetostriction and Magnetomechanical Effects, For editorial issues, permissions, book requests, submissions and proceedings, contact the Amsterdam office [email protected] by: 3.

The Fe 3 GeTe 2 material is the only metallic ferromagnet with a van der Waals layered structure, which has been used as a ferromagnetic electrode in spintronic devices.

The tunability of magnetic properties of few-layer Fe 3 GeTe 2 by electrostatic gating is demonstrated in experiments. In this work, we present a theoretical investigation of the electric field effect on the magnetic Author: Yun-Peng Wang, Xiao-Yan Chen, Meng-Qiu Long.

Amorphous Tb-DyFe films, which are prepared possessing an in plane or transverse magnetic anisotropy, show excellent soft-magnetic properties combined with giant magnetostriction.

However, for technical applications the major drawback is the low Curie temperature which is typically around by: 2. magnetostriction (măg-nē′tō-strĭk′shən) n. Deformation of a material, especially a ferromagnetic material, exposed to a magnetic field. Rapidly alternating magnetostriction causes the iron cores of transformers to hum or buzz.

[magneto- + (con)striction.] magne′tostric′tive adj. magnetostriction (mæɡˌniːtəʊˈstrɪkʃən) n. Abstract: The magnetic anisotropy (MA) The longitudinal magnetostriction (Fe Co ) 88 Hf 2 W 2 Mo 2 Zr 1 B 4 Cu 1 alloy ribbon after its nanocrystallization at °C for min in the presence or absence of tensile stresses σ were studied.

It was shown that under the effect of tensile stresses a longitudinal magnetic. Magnetic tunnel junction (MTJ), which arises from emerging spintronics, has the potential to become the basic component of novel memory, logic circuits, and other applications.

Particularly since the first demonstration of current induced magnetization switching in MTJ, spin transfer torque magnetic random access memory (STT-MRAM) has sparked a huge interest thanks to its non-volatility, fast Cited by: w Sound power S w,ref Reference sound power S v Total area of the surface of the test room t Time coordinate t L Thickness of the lamination T Torque u A Type A uncertainty u B Type B uncertainty U Uncertainty v Instantaneous induced voltage W 17/50 Core loss at magnetic flux density, T, 50 Hz x Space coordinate y Measured value.

Magnetostrictive effect can be described by a magnetic anisotropy field Hs induced by stress expressed as: [8] (2) 3 Ms Hs VO where O is the magnetostriction constant and Ms the saturation magnetization.

Substituting V in (2) by (1) results in: (3) (1) 3 Q2 OH E Ms Hs The strain Hf for a thin film (f) on a much thicker substrate (s) with a. Magnetostatic energy Up: Thermodynamic relations Previous: Exchange energy Contents Magnetocrystalline anisotropy energy.

The Heisenberg Hamiltonian is completely isotropic, and its energy levels do not depend on the direction in space in which the crystal is magnetized. Consequently, tailoring the magnetoelastic anisotropy of amorphous microwires, either through the control of the internal stresses or the magnetostriction coefficient or induced magnetic anisotropy by specially designed post-processing are the main route to optimize the GMI effect in amorphous microwires [9,15,18].Cited by: 4.

iv “Induced Anisotropy, Magnetic Domain Structure And Magneto impedance effect in CoFeB Amorphous Thin Films” D. Garcia, J.L Munoz, G. Kurlyandskaya, M. Vazquez, M. Ali & M.R.J Gibbs J. Magn. Magn. Mat. Growth and study of magnetostrictive FeSiBC thin films, for device applications, Mannan Ali ().

Patrick N.J. Rasolofosaon, Hezhu Yin, "Simultaneous Characterization of Anisotropy and Nonlinearity in Arbitrary Elastic Media – Reflections on Experimental Data", Seismic Anisotropy, Erling Fjær, Rune M. Holt, Jaswant S.

Rathore. Beyond a phenomenological description of magnetostriction A. Reid1,2*, 1,X. Shen3, P. Maldonado4, Magnetostriction, the strain induced by a change in magnetization, is a universal effect in magnetic high magneto-crystalline anisotropy in FePt.

2 Recent reports have shown that FePt also exhibits an all. 1 Unusual magneto-transport of YBa 2Cu 3O7-δδδδ films due to the interplay of anisotropy, random disorder and nanoscale periodic pinning J.

Trastoy 1, V. Rouco 1,2, C. Ulysse 3, R. Bernard 1, A. Palau 2, T. Puig 2, G. Faini 3, J. Lesueur 4, J. Briatico 1 and J.E. Villegas 1, 1Unité Mixte de Physique CNRS/Thales, 1 avenue A. Fresnel, Palaiseau, and.

Ullakko K and Lindroos V K Effect of crystal structure on magnetic-field-induced strain in Ni-Mn-Ga. Proc. SPIESöderberg O, Ge Y, Sozinov A, Hannula S-P and Lindroos V K Giant Magnetostrictive Materials, In: Buschow J (ed.) Series Handbook on Magnetic Materials.

Elsevier Science, Amsterdam (to be published). Magnetic interactions vs anisotropy dipol-dipol interaction Þ shape anisotropy in epitaxial (III,Mn)V the crystalline anisotropy dominates over exchange interaction Þ crystalline anisotropy shape anisotropy compressive tensile strain strain X.

Liu et al., Phys. Rev. B 67, () W. Lim et al., Phys. Rev. B 74, () K. R.Q. Wu, “First Principles Determination of Magnetic Anisotropy and Magnetostriction in Transition Metal Alloys”, edited by W. Nolting and K. Babersche (Springer-Verlag, Berlin ). R.Q. Wu, “First Principles Determination of Magnetostriction in Transition Metal Thin Films, Alloys and Compounds”, edited by M.R.J.

Gibbs (Kluwer. While magnetic devices are used in a range of applications, the availability of up-to-date books on magnetic measurements is quite limited. Collecting state-of-the-art knowledge from information scattered throughout the literature, Handbook of Magnetic Measurements covers a wide spectrum of topics pertaining to magnetic measurements.

It describes magnetic materials and sensors, the testing of. This banner text can have markup. web; books; video; audio; software; images; Toggle navigation. PHYSICAL REVIEW B 68, ͑͒Dipole interaction and magnetic anisotropy in gadolinium compounds M.

Rotter* Institut fu¨r Physikalische Chemie, Universita¨t Wien, A– Wien, Austriaand Institut fu¨r Festko¨rperphysik, Technische Universita¨t Dresden, D– Dresden, Germany M.

Loewenhaupt and M. DoerrInstitut fu¨r Festko¨rperphysik, Technische Universita¨t Dresden, D. TY - JOUR. T1 - Validity of the force theorem for magnetocrystalline anisotropy.

AU - Wang, Xindong. AU - Wang, Ding Sheng. AU - Ruqian, Wu. AU - Freeman, A. by: radiation effects on the anisotropy and magnetostriction of single crystals of several soft magnetic materials including ni, fe, fe*sub 3/o*sub 4/, and alloys of fe, si-fe, al-fe, co-fe, and mo-ni-fe Journal Article Hall, R C ; Byrnes, W S ; Crawford, R G - Journal of Applied Physics (U.S.).

The out-of-plane magnetic anisotropy of FeNi thin films is reduced by depositing with Al and completely removed by depositing with B. The effect of depositing with Mo is dependent on the Mo concentration.

The coercivity of FeNiMo and FeNiAl is reduced to less than a half of that of FeNi, and a value as low as 40 A/m is obtained for FeNiB. Legendary Bio Vishanti says: "Wow, this guy sucks more then I do.

Imagine that, *sarcastically says* Oh yeah, a person who controls metal can beat **THE** God of Thunder.". Increased magnetocrystalline anisotropy and magnetostriction canmore» Rare-earth impurities and other ions with short spin-lattice relaxation times can cause increased microwave losses.

In this article, the basic magnetochemistry pertaining to ferrites will be examined for adaptation of ferrite technology to cryogenic environments. {copyright. Setup with 2x2 optical switch Zayets et al, Patent appl.,; in Japanese; in English Figures 3 shows the setup for measurements of the Kerr rotation angle with 2x2 optical switch.Magnetostrictive material exhibits free strain under the influence of magnetic field.

In this 2D axisymmetric model, the nonlinear relationship between magnetostriction and magnetic field is implemented using a nonlinear constitutive relationship. A nonlinear B-H curve has also been used to reflect a realistic magnetic behavior.Magneto-optical Kerr effect (MOKE) measurements of the films show that the Ni particles have sufficient vertical magnetic anisotropy to support perpendicular magnetization.

Residual stresses measured by x-ray diffraction techniques, crystallographic orientation, and film thickness are related to magnetic properties measured by MOKE.

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