A comparative study of the hyperfine fields in ferromagnetic GdRh and GdZn

Journal Article · Thu Apr 01 04:00:00 EST 1976 · J. Appl. Phys., v. 47, no. 4, pp. 1662-1667

DOI:https://doi.org/10.1063/1.322789· OSTI ID:4040196

Dormann, E; Buschow, K H.J.

The zero-field nuclear resonance of $sup 155$Gd, $sup 157$Gd, $sup 103$Rh, and $sup 139$La were studied in Gd$sub 1$/sub -//subx/La/subx/Rh. Magnetic measurements performed on GdRh show that this compound has a Curie temperature of 24 K and a magnetization corresponding to 6.6$mu$/subB//Gd at 4.2 K. These values are low compared with those of GdZn (270 K; 7.5$mu$/subB//Gd). The NMR results of Gd$sub 1$/sub -//subx/La/subx/Rh are compared with similar data available for Gd$sub 1$/sub -//subx/La/subx/Zn. For both series the hyperfine field at the Gd site is separated into its different contributions. The transferred hyperfine field at the Gd site is positive in GdRh but negative in GdZn. It is suggested that the exchange interaction between the 4f moments in GdZn proceeds predominantly via d-electron polarization, whereas the RKKY-type interaction, mediated by s electrons, is relatively weak.

• Research Organization: Experimentalphysik II, Technische Hochschule Darmstadt, D-61 Darmstadt, Germany
• Sponsoring Organization: USDOE
• NSA Number: NSA-33-030236
• OSTI ID: 4040196
• Journal Information: J. Appl. Phys., v. 47, no. 4, pp. 1662-1667, Journal Name: J. Appl. Phys., v. 47, no. 4, pp. 1662-1667; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

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EXCHANGE INTERACTIONS
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GADOLINIUM 155
GADOLINIUM 157
INTERMETALLIC COMPOUNDS
LANTHANUM ADDITIONS-- LANTHANUM 139-- RHODIUM ALLOYS-- RHODIUM 103
MAGNETIC FIELDS
MAGNETIZATION
N50230* --Metals
Ceramics
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NUCLEAR MAGNETIC RESONANCE
RUDERMAN-KITTEL COUPLING ZINC ALLOYS