Measurement at the magnetic a.c. susceptibility at frequencies between 2 MHz and 1 GHz: zero field spin-spin relaxation of cerium- and neodymium-magnesium nitrate at 4.2 K

Grambow, J; Weber, G.

doi:10.1088/0022-3735/4/11/016

Cited by 7 publications

(1 citation statement)

References 7 publications

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“…Other techniques have been used to measure ac susceptibility at low temperatures and high frequencies, including the use of resonant circuits 4 and the tunnel diode oscillator technique 5 which require long measurement times for multiple frequencies. Toroidal based systems are capable of measuring into the GHz range but are limited by low sensitivity and difficulties in mounting of the sample [6][7][8] . Micro-SQUID systems, suitable for microscopic samples have also worked at high frequencies 9 .…”

Section: Introductionmentioning

confidence: 99%

Design and implementation of a low temperature, inductance based high frequency alternating current susceptometer

Riordan

Blomgren

Jonasson

et al. 2019

Review of Scientific Instruments

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We report on the development of an induction based low temperature high frequency ac susceptometer capable of measuring at frequencies up to 3.5 MHz and at temperatures between 2 K and 300 K. Careful balancing of the detection coils and calibration have allowed a sample magnetic moment resolution of 5×10 −10 Am 2 at 1 MHz. We will discuss the design and characterization of the susceptometer, and explain the calibration process. We also include some example measurements on the spin ice material CdEr 2 S 4 and iron oxide based nanoparticles to illustrate functionality.

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Section: Introductionmentioning

confidence: 99%

Design and implementation of a low temperature, inductance based high frequency alternating current susceptometer

Riordan

Blomgren

Jonasson

et al. 2019

Review of Scientific Instruments

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Magnetic Susceptibility. Instrumentation and Applications Including Lunar Biotype

Mulay¹,

Mulay²

1972

Anal. Chem.

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Zero wave vector kinetic coefficient in the isotropic ferromagnet EuO near Tc

Gottlieb

Dunlap

1979

Journal of Applied Physics

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We have measured the zero wave vector kinetic coefficient and relaxation time for the isotropic Heisenberg ferromagnet EuO using zero-field electron spin reasonance. Measurements were made by monitoring the absorptive part of the uniform susceptibility χ (q=0,ω;T) at fixed frequency, ω/2π?20MHz, as a function of applied field. The zero wave vector kinetic coefficient asymtotically approached a constant value, conventional behavior, as the critical temperature was neared from above. Our measurements are consistant with a crossover of the dynamical critical exponent z from 5/2 to ?2 in the region 4πχ≳1, where the dipole interaction dominates.

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Measurement at the magnetic a.c. susceptibility at frequencies between 2 MHz and 1 GHz: zero field spin-spin relaxation of cerium- and neodymium-magnesium nitrate at 4.2 K

Cited by 7 publications

References 7 publications

Design and implementation of a low temperature, inductance based high frequency alternating current susceptometer

Design and implementation of a low temperature, inductance based high frequency alternating current susceptometer

Magnetic Susceptibility. Instrumentation and Applications Including Lunar Biotype

Zero wave vector kinetic coefficient in the isotropic ferromagnet EuO near Tc

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