High-temperature magnetostriction of magnetite and titanomagnetites

B. M. Moskowitz

doi:10.1029/92JB01846

High-temperature magnetostriction of magnetite and titanomagnetites

B. M. Moskowitz

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Abstract

Magnetostriction of synthetic polycrystalline magnetite and titanium-rich titanomagnetites has been measured from 25°C to their Curie temperatures. These are the first reported measurements of magnetostriction above room temperature for titanomagnetites. The thermal dependence of the polycrystalline magnetostriction constant λ_s(T) varies as (1-T/T_c)^1.3 for titanium-rich titanomagnetites and as (1-T/T_c)^0.9 for pure magnetite. The polycrystalline magnetostriction constant is well approximated by a power law equation in terms of the saturation magnetization, λ_s(T)∝M_s(T)ⁿ, where n=2.31 (TM0), 3.47 (TM40), 2.75 (TM60), and 2.80 (AMTM60). -from Author

Original language	English (US)
Pages (from-to)	359-371
Number of pages	13
Journal	Journal of Geophysical Research
Volume	98
Issue number	B1
DOIs	https://doi.org/10.1029/92JB01846
State	Published - 1993
Externally published	Yes

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title = "High-temperature magnetostriction of magnetite and titanomagnetites",

abstract = "Magnetostriction of synthetic polycrystalline magnetite and titanium-rich titanomagnetites has been measured from 25°C to their Curie temperatures. These are the first reported measurements of magnetostriction above room temperature for titanomagnetites. The thermal dependence of the polycrystalline magnetostriction constant λs(T) varies as (1-T/Tc)1.3 for titanium-rich titanomagnetites and as (1-T/Tc)0.9 for pure magnetite. The polycrystalline magnetostriction constant is well approximated by a power law equation in terms of the saturation magnetization, λs(T)∝Ms(T)n, where n=2.31 (TM0), 3.47 (TM40), 2.75 (TM60), and 2.80 (AMTM60). -from Author",

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year = "1993",

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T1 - High-temperature magnetostriction of magnetite and titanomagnetites

AU - Moskowitz, B. M.

PY - 1993

Y1 - 1993

N2 - Magnetostriction of synthetic polycrystalline magnetite and titanium-rich titanomagnetites has been measured from 25°C to their Curie temperatures. These are the first reported measurements of magnetostriction above room temperature for titanomagnetites. The thermal dependence of the polycrystalline magnetostriction constant λs(T) varies as (1-T/Tc)1.3 for titanium-rich titanomagnetites and as (1-T/Tc)0.9 for pure magnetite. The polycrystalline magnetostriction constant is well approximated by a power law equation in terms of the saturation magnetization, λs(T)∝Ms(T)n, where n=2.31 (TM0), 3.47 (TM40), 2.75 (TM60), and 2.80 (AMTM60). -from Author

AB - Magnetostriction of synthetic polycrystalline magnetite and titanium-rich titanomagnetites has been measured from 25°C to their Curie temperatures. These are the first reported measurements of magnetostriction above room temperature for titanomagnetites. The thermal dependence of the polycrystalline magnetostriction constant λs(T) varies as (1-T/Tc)1.3 for titanium-rich titanomagnetites and as (1-T/Tc)0.9 for pure magnetite. The polycrystalline magnetostriction constant is well approximated by a power law equation in terms of the saturation magnetization, λs(T)∝Ms(T)n, where n=2.31 (TM0), 3.47 (TM40), 2.75 (TM60), and 2.80 (AMTM60). -from Author

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DO - 10.1029/92JB01846

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SN - 0148-0227

VL - 98

SP - 359

EP - 371

JO - Journal of Geophysical Research

JF - Journal of Geophysical Research

IS - B1

ER -

High-temperature magnetostriction of magnetite and titanomagnetites

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