Variable temperature electron paramagnetic resonance investigations of a kerosene-based magnetic fluid

R. P. Pant; R. M. Krishna; D. P. Singh; D. Srinivas; R. V. Mehta

doi:10.1016/S0304-8853(96)00358-7

Variable temperature electron paramagnetic resonance investigations of a kerosene-based magnetic fluid

R. P. Pant, R. M. Krishna, D. P. Singh, D. Srinivas, R. V. Mehta

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

The kerosene-based ferrofluid RP-90 has been examined by electron paramagnetic resonance (EPR) from room temperature to liquid nitrogen temperature at the X-band frequency 9.41 GHz. The variations in the g-value and (ΔH) with temperature indicate the presence of a magnetic phase transition from a ferromagnetic to a 'spin glass or cluster glass' state. This transition is associated with the freezing point of the carrier medium. No evidence of the presence of superparamagnetism was observed. The linewidth variation with temperature indicates a dominant bulk rotation relaxation mechanism (τ_B).

Original language	English
Pages (from-to)	143-146
Number of pages	4
Journal	Journal of Magnetism and Magnetic Materials
Volume	164
Issue number	1-2
DOIs	https://doi.org/10.1016/S0304-8853(96)00358-7
Publication status	Published - Nov 1996
Externally published	Yes

Keywords

Electron paramagnetic resonance
Magnetic fluid
Rotation relaxation

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1016/S0304-8853(96)00358-7

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title = "Variable temperature electron paramagnetic resonance investigations of a kerosene-based magnetic fluid",

abstract = "The kerosene-based ferrofluid RP-90 has been examined by electron paramagnetic resonance (EPR) from room temperature to liquid nitrogen temperature at the X-band frequency 9.41 GHz. The variations in the g-value and (ΔH) with temperature indicate the presence of a magnetic phase transition from a ferromagnetic to a 'spin glass or cluster glass' state. This transition is associated with the freezing point of the carrier medium. No evidence of the presence of superparamagnetism was observed. The linewidth variation with temperature indicates a dominant bulk rotation relaxation mechanism (τB).",

keywords = "Electron paramagnetic resonance, Magnetic fluid, Rotation relaxation",

author = "Pant, {R. P.} and Krishna, {R. M.} and Singh, {D. P.} and D. Srinivas and Mehta, {R. V.}",

year = "1996",

month = nov,

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T1 - Variable temperature electron paramagnetic resonance investigations of a kerosene-based magnetic fluid

AU - Pant, R. P.

AU - Krishna, R. M.

AU - Singh, D. P.

AU - Srinivas, D.

AU - Mehta, R. V.

PY - 1996/11

Y1 - 1996/11

N2 - The kerosene-based ferrofluid RP-90 has been examined by electron paramagnetic resonance (EPR) from room temperature to liquid nitrogen temperature at the X-band frequency 9.41 GHz. The variations in the g-value and (ΔH) with temperature indicate the presence of a magnetic phase transition from a ferromagnetic to a 'spin glass or cluster glass' state. This transition is associated with the freezing point of the carrier medium. No evidence of the presence of superparamagnetism was observed. The linewidth variation with temperature indicates a dominant bulk rotation relaxation mechanism (τB).

AB - The kerosene-based ferrofluid RP-90 has been examined by electron paramagnetic resonance (EPR) from room temperature to liquid nitrogen temperature at the X-band frequency 9.41 GHz. The variations in the g-value and (ΔH) with temperature indicate the presence of a magnetic phase transition from a ferromagnetic to a 'spin glass or cluster glass' state. This transition is associated with the freezing point of the carrier medium. No evidence of the presence of superparamagnetism was observed. The linewidth variation with temperature indicates a dominant bulk rotation relaxation mechanism (τB).

KW - Electron paramagnetic resonance

KW - Magnetic fluid

KW - Rotation relaxation

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U2 - 10.1016/S0304-8853(96)00358-7

DO - 10.1016/S0304-8853(96)00358-7

M3 - Article

AN - SCOPUS:0030566253

SN - 0304-8853

VL - 164

SP - 143

EP - 146

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

IS - 1-2

ER -

Variable temperature electron paramagnetic resonance investigations of a kerosene-based magnetic fluid

Abstract

Keywords

ASJC Scopus subject areas

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