Magnetic ordering in amorphous Nd-Co, Gd-Co and Er-Co alloys

J. A. Gerber, D. J. Miller, D. J. Sellmyer

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Previous studies of magnetism in amorphous rare earth-transition metal alloys have emphasized alloys rich in transition metal. We report here results on three rare earth rich amorphous alloys: Nd64Co36, Gd65Co35, and Er65Co35. Low field susceptibility, χ, was measured for T in the range 4.2 K≤T≤300 K and magnetization was measured for 1. 3≤T≤200 K and applied fields, H, of 0≤H≤80 kOe. Curie-Weiss fits were made to high temperature χ (T) data to determine average effective moments and Weiss temperatures. Hysteresis loops were used to determine the coercive force and the ordering temperatures, TC. The effective moments and saturation moments are compared with values calculated on the assumption of local moments on both the rare earth and Co ions. T C values for Nd, Gd, and Er alloys are 38 K, 170 K, and 12 K, respectively. The data are consistent with a ferrimagnetic structure in Gd 65Co35. Local random anisotropy appears to play an important role in the Nd-Co and the Er-Co alloys.

Original languageEnglish (US)
Pages (from-to)1699-1701
Number of pages3
JournalJournal of Applied Physics
Volume49
Issue number3
DOIs
StatePublished - Dec 1 1978

Fingerprint

moments
rare earth elements
transition metals
hysteresis
magnetic permeability
saturation
magnetization
anisotropy
temperature
ions

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Magnetic ordering in amorphous Nd-Co, Gd-Co and Er-Co alloys. / Gerber, J. A.; Miller, D. J.; Sellmyer, D. J.

In: Journal of Applied Physics, Vol. 49, No. 3, 01.12.1978, p. 1699-1701.

Research output: Contribution to journalArticle

Gerber, J. A. ; Miller, D. J. ; Sellmyer, D. J. / Magnetic ordering in amorphous Nd-Co, Gd-Co and Er-Co alloys. In: Journal of Applied Physics. 1978 ; Vol. 49, No. 3. pp. 1699-1701.
@article{2241bc3ce81143dbb8916adbced71258,
title = "Magnetic ordering in amorphous Nd-Co, Gd-Co and Er-Co alloys",
abstract = "Previous studies of magnetism in amorphous rare earth-transition metal alloys have emphasized alloys rich in transition metal. We report here results on three rare earth rich amorphous alloys: Nd64Co36, Gd65Co35, and Er65Co35. Low field susceptibility, χ, was measured for T in the range 4.2 K≤T≤300 K and magnetization was measured for 1. 3≤T≤200 K and applied fields, H, of 0≤H≤80 kOe. Curie-Weiss fits were made to high temperature χ (T) data to determine average effective moments and Weiss temperatures. Hysteresis loops were used to determine the coercive force and the ordering temperatures, TC. The effective moments and saturation moments are compared with values calculated on the assumption of local moments on both the rare earth and Co ions. T C values for Nd, Gd, and Er alloys are 38 K, 170 K, and 12 K, respectively. The data are consistent with a ferrimagnetic structure in Gd 65Co35. Local random anisotropy appears to play an important role in the Nd-Co and the Er-Co alloys.",
author = "Gerber, {J. A.} and Miller, {D. J.} and Sellmyer, {D. J.}",
year = "1978",
month = "12",
day = "1",
doi = "10.1063/1.324893",
language = "English (US)",
volume = "49",
pages = "1699--1701",
journal = "Journal of Applied Physics",
issn = "0021-8979",
publisher = "American Institute of Physics Publising LLC",
number = "3",

}

TY - JOUR

T1 - Magnetic ordering in amorphous Nd-Co, Gd-Co and Er-Co alloys

AU - Gerber, J. A.

AU - Miller, D. J.

AU - Sellmyer, D. J.

PY - 1978/12/1

Y1 - 1978/12/1

N2 - Previous studies of magnetism in amorphous rare earth-transition metal alloys have emphasized alloys rich in transition metal. We report here results on three rare earth rich amorphous alloys: Nd64Co36, Gd65Co35, and Er65Co35. Low field susceptibility, χ, was measured for T in the range 4.2 K≤T≤300 K and magnetization was measured for 1. 3≤T≤200 K and applied fields, H, of 0≤H≤80 kOe. Curie-Weiss fits were made to high temperature χ (T) data to determine average effective moments and Weiss temperatures. Hysteresis loops were used to determine the coercive force and the ordering temperatures, TC. The effective moments and saturation moments are compared with values calculated on the assumption of local moments on both the rare earth and Co ions. T C values for Nd, Gd, and Er alloys are 38 K, 170 K, and 12 K, respectively. The data are consistent with a ferrimagnetic structure in Gd 65Co35. Local random anisotropy appears to play an important role in the Nd-Co and the Er-Co alloys.

AB - Previous studies of magnetism in amorphous rare earth-transition metal alloys have emphasized alloys rich in transition metal. We report here results on three rare earth rich amorphous alloys: Nd64Co36, Gd65Co35, and Er65Co35. Low field susceptibility, χ, was measured for T in the range 4.2 K≤T≤300 K and magnetization was measured for 1. 3≤T≤200 K and applied fields, H, of 0≤H≤80 kOe. Curie-Weiss fits were made to high temperature χ (T) data to determine average effective moments and Weiss temperatures. Hysteresis loops were used to determine the coercive force and the ordering temperatures, TC. The effective moments and saturation moments are compared with values calculated on the assumption of local moments on both the rare earth and Co ions. T C values for Nd, Gd, and Er alloys are 38 K, 170 K, and 12 K, respectively. The data are consistent with a ferrimagnetic structure in Gd 65Co35. Local random anisotropy appears to play an important role in the Nd-Co and the Er-Co alloys.

UR - http://www.scopus.com/inward/record.url?scp=0017942275&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0017942275&partnerID=8YFLogxK

U2 - 10.1063/1.324893

DO - 10.1063/1.324893

M3 - Article

AN - SCOPUS:0017942275

VL - 49

SP - 1699

EP - 1701

JO - Journal of Applied Physics

JF - Journal of Applied Physics

SN - 0021-8979

IS - 3

ER -