Magnetic amorphous Co-Cd powders prepared by mechanical alloying

Pekka Ruuskanen, B. Schwarz, J. Thompson

Research output: Contribution to journalArticleScientificpeer-review

5 Citations (Scopus)

Abstract

Amorphous Co1-xGdx powders with x = 0.10, 0.15, 0.20 and 0.25 were prepared by mechanically alloying mixtures of elemental cobalt and gadolinium powders in a laboratory high-energy ball mill. The alloys crystallize above 500°C. The magnetic properties of the amorphous powders were measured in toroidal samples made by cold pressing the powders. For x ⩽ 0.15, amorphous Co-Gd is ferromagnetic at all temperatures. In amorphous Co75 Gd25, the net magnetic moment has a minimum near the compensation temperature Tcom = 50°C, at which the cobalt and gadolinium spins align in opposite directions. The low-temperature magnetic moment of this alloy suggests that, on cooling, it forms a spin glass with a freezing temperature of 60K.
Original languageEnglish
Pages (from-to)47-56
Number of pages10
JournalPhilosophical Magazine B: Physics of Condensed Matter; Electronic, Optical and Magnetic Properties
Volume69
Issue number1
DOIs
Publication statusPublished - 1994
MoE publication typeA1 Journal article-refereed

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Mechanical alloying
Powders
Gadolinium
Magnetic moments
Cobalt
Temperature
Spin glass
Ball mills
Alloying
Freezing
Magnetic properties
Cooling

Cite this

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title = "Magnetic amorphous Co-Cd powders prepared by mechanical alloying",
abstract = "Amorphous Co1-xGdx powders with x = 0.10, 0.15, 0.20 and 0.25 were prepared by mechanically alloying mixtures of elemental cobalt and gadolinium powders in a laboratory high-energy ball mill. The alloys crystallize above 500°C. The magnetic properties of the amorphous powders were measured in toroidal samples made by cold pressing the powders. For x ⩽ 0.15, amorphous Co-Gd is ferromagnetic at all temperatures. In amorphous Co75 Gd25, the net magnetic moment has a minimum near the compensation temperature Tcom = 50°C, at which the cobalt and gadolinium spins align in opposite directions. The low-temperature magnetic moment of this alloy suggests that, on cooling, it forms a spin glass with a freezing temperature of 60K.",
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Magnetic amorphous Co-Cd powders prepared by mechanical alloying. / Ruuskanen, Pekka; Schwarz, B.; Thompson, J.

In: Philosophical Magazine B: Physics of Condensed Matter; Electronic, Optical and Magnetic Properties, Vol. 69, No. 1, 1994, p. 47-56.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Magnetic amorphous Co-Cd powders prepared by mechanical alloying

AU - Ruuskanen, Pekka

AU - Schwarz, B.

AU - Thompson, J.

N1 - Project code: VAL4022

PY - 1994

Y1 - 1994

N2 - Amorphous Co1-xGdx powders with x = 0.10, 0.15, 0.20 and 0.25 were prepared by mechanically alloying mixtures of elemental cobalt and gadolinium powders in a laboratory high-energy ball mill. The alloys crystallize above 500°C. The magnetic properties of the amorphous powders were measured in toroidal samples made by cold pressing the powders. For x ⩽ 0.15, amorphous Co-Gd is ferromagnetic at all temperatures. In amorphous Co75 Gd25, the net magnetic moment has a minimum near the compensation temperature Tcom = 50°C, at which the cobalt and gadolinium spins align in opposite directions. The low-temperature magnetic moment of this alloy suggests that, on cooling, it forms a spin glass with a freezing temperature of 60K.

AB - Amorphous Co1-xGdx powders with x = 0.10, 0.15, 0.20 and 0.25 were prepared by mechanically alloying mixtures of elemental cobalt and gadolinium powders in a laboratory high-energy ball mill. The alloys crystallize above 500°C. The magnetic properties of the amorphous powders were measured in toroidal samples made by cold pressing the powders. For x ⩽ 0.15, amorphous Co-Gd is ferromagnetic at all temperatures. In amorphous Co75 Gd25, the net magnetic moment has a minimum near the compensation temperature Tcom = 50°C, at which the cobalt and gadolinium spins align in opposite directions. The low-temperature magnetic moment of this alloy suggests that, on cooling, it forms a spin glass with a freezing temperature of 60K.

U2 - 10.1080/13642819408236878

DO - 10.1080/13642819408236878

M3 - Article

VL - 69

SP - 47

EP - 56

JO - Philosophical Magazine B: Physics of Condensed Matter, Structural, Electronic, Optical, and Magnetic Properties

JF - Philosophical Magazine B: Physics of Condensed Matter, Structural, Electronic, Optical, and Magnetic Properties

SN - 0958-6644

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