Elastic, magnetoelastic, and thermal properties of some ferromagnetic metallic glasses

Hausch, G.; Torok, E. J.

doi:10.1002/pssa.2210500118

Cited by 21 publications

(2 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The enhanced E in the alloyed glasses is correlated to the magnetic ordering by Chou. The influence of magnetic ordering, however, is found to be insignificant in a ferromagnetic metallic glass Fe75P15C10 (Berry and Pritchet 1976b) and FeNi-based alloys (Hausch and Torok 1978) as evidenced by the absence of a noticeable change of slope in the saturation Young's modulus Es against T curve on passing through the Curie temperature.…”

Section: Elastic Constantsmentioning

confidence: 99%

Glassy metals

Chen¹

1980

Rep. Prog. Phys.

990

286

View full text Add to dashboard Cite

Glassy metals not only exhibit technologically interesting properties, e.g. high fracture strength, excellent soft magnetic behaviour and good corrosion resistance, they also constitute ideal materials for the studies of low-temperature transport, critical behaviour and electrical properties of disordered metals. During the past several years, there have been considerable efforts on the fundamental understanding of structure, atomic and electronic transport properties and low-temperature behaviour as well as further exploration of mechanical, magnetic and chemical properties. This review attempts to summarise past developments and to review comprehensively the present knowledge of structure and physical properties of glassy metals. The nature of the glassy state, various quenching techniques and glass-forming alloys are described first, followed by the discussion of structural models, experimental structural data and atomic transport properties including diffusivities and kinetics of structural relaxation, magnetic aging and crystallisation. The mechanical properties and magnetic behaviour are summarised, with emphasis laid on the influence of modification of these properties due to changes in structural and chemical disorder and states of magnetisation. Finally the electrical transport properties, spin wave excitations and critical behaviour, thermal and acoustic behaviour at very low temperatures, and chemical properties are presented.

show abstract

Section: Elastic Constantsmentioning

confidence: 99%

Glassy metals

Chen¹

1980

Rep. Prog. Phys.

990

286

View full text Add to dashboard Cite

show abstract

“…All elements are 28 μm thick. The reference resonator is helpful because the Young's modulus of the sensor material varies with temperature [45], [46]. This (common mode) variation in the absence of strain can be compensated by the response of the reference element.…”

Section: A Resonating Elementsmentioning

confidence: 99%

Passive Wireless Strain Sensors Using Microfabricated Magnetoelastic Beam Elements

Pepakayala

Green

Gianchandani

2014

J. Microelectromech. Syst.

View full text Add to dashboard Cite

This paper describes resonant wireless strain sensors fabricated from magnetoelastic alloys. The transduction mechanism is the E effect-the change in stiffness of magnetoelastic materials with applied strain or magnetic field. This is measured as a shift in the resonant frequency and is detected wirelessly using pick-up coils utilizing the magnetoelastic coupling of these materials. The sensors are fabricated from a 28-μm-thick foil of Metglas 2826 MB (Fe 40 Ni 38 Mo 4 B 18 ), a ferromagnetic magnetoelastic alloy, using microelectrodischarge machining. Two sensor types are described-single and differential. The single sensor has an active area of 7 × 2 mm 2 , excluding the anchors. At 23°C, it operates at a resonant frequency of 230.8 kHz and has a sensitivity of 13 × 10 3 ppm/mstrain; the dynamic range is 0.05-1.05 mstrain. The differential sensor includes a strain independent reference resonator of area 2 × 0.5 mm 2 in addition to a sensing element of area 2.5 × 0.5 mm 2 that is divided into two segments. The sensor resonance is at 266.4 kHz and reference resonance is at 492.75 kHz. The differential sensor provides a dynamic range for 0-1.85 mstrain with a sensitivity of 12.5 × 10 3 ppm/mstrain at 23°C. The reference resonator of the differential sensor is used to compensate for the temperature dependence of the Young's modulus of Metglas 2826 MB, which is experimentally estimated to be −524 ppm/°C. For an increment of 35°C, uncompensated sensors exhibit a resonant frequency shift of up to 42% of the dynamic range for the single sensor and 30% of the dynamic range of the differential sensor, underscoring the necessity of temperature compensation. The geometry of both types of sensors can be modified to accommodate a variety of sensitivity and dynamic range requirements.[2013-0330] IndexTerms-Strain measurement, magnetoelasticity, resonant sensing, Metglas, E effect.

show abstract

Characterization and studies of electroactive properties of an organometallic polymer of iron‐phthalocyanine

Nalwa

1988

Applied Organom Chemis

View full text Add to dashboard Cite

An iron-phthalocyanine polymer has been characterized by infrared spectroscopy, X-ray diffraction and Mossbauer spectroscopy. The electrical properties of resistivity, dielectric constant and the thermally stimulated depolarization effect have been investigated in the temperature range 30-240°C. The depolarization of thermoelectret shows two current peaks at about 176°C and 200°C. The unpolarized sample also displays a pyroelectric current on heating, indicating the possibility of ferroelectric polarization. A temperature-dependent measurement of the dielectric constant exhibits a dielectric maximum around 180°C which is likely due to electret current peaks. The results have been compared with a monomer of iron-phthalocyanine and interpretations are made in terms of the highly delocalized n-electron system of the phthalocyanine macrocycle being further extended by polymerization.

show abstract

Elastic, magnetoelastic, and thermal properties of some ferromagnetic metallic glasses

Cited by 21 publications

References 27 publications

Glassy metals

Glassy metals

Passive Wireless Strain Sensors Using Microfabricated Magnetoelastic Beam Elements

Characterization and studies of electroactive properties of an organometallic polymer of iron‐phthalocyanine

Contact Info

Product

Resources

About