Tunable thermal hysteresis in CoGd alloys

被引：21

作者：

Demirtas, S

Camley, RE

Koymen, AR

机构：

[1] Univ Texas, Dept Phys, Arlington, TX 76019 USA

[2] Univ Colorado, Dept Phys, Colorado Springs, CO 80933 USA

来源：

APPLIED PHYSICS LETTERS | 2005年 / 87卷 / 20期

关键词：

D O I：

10.1063/1.2132530

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We show that tunable magnetic thermal hysteresis can be realized for a simple ferrimagnetic CoGd alloy. The magnetization of a Co0.8Gd0.2 alloy shows a bow-tie curve as a function of temperature, which indicates supercooled and superheated phase transitions. The width of the magnetic thermal hysteresis can be tuned by an external magnetic field, with values of 190 K at fields near 100 Oe and values of 20 K near 400 Oe. Experimental results are in reasonable agreement with theoretical calculations. (C) 2005 American Institute of Physics.

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页码：1 / 3

页数：3

相关论文

共 29 条

[1]

Andrés JP, 2002, PHYS REV B, V66, DOI 10.1103/PhysRevB.66.094424

[2] Element-specific magnetization of a Gd-Co composite system using spin-polarized Auger electron spectroscopy [J].

Anilturk, OS ;

Koymen, AR .

PHYSICAL REVIEW B, 2003, 68 (02)

[3] ELEMENT specific magnetization of GdCo composite system using Spin polarized Auger electron spectroscopy (SPAES) [J].

Anilturk, OS ;

Koymen, AR .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2004, 272 :531-533

[4] Second- and first-order phase transitions in the magnetic reorientation of ultrathin Fe on Gd [J].

Arnold, CS ;

Pappas, DP ;

Popov, AP .

PHYSICAL REVIEW LETTERS, 1999, 83 (16) :3305-3308

[5] Tunable thermal hysteresis in magnetic multilayers: magnetic superheating and supercooling [J].

Camley, RE ;

Lohstroh, W ;

Felcher, GP ;

Hosoito, N ;

Hashizume, H .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2005, 286 :65-71

[6] MAGNETIC MULTILAYERS - SPIN CONFIGURATIONS, EXCITATIONS AND GIANT MAGNETORESISTANCE [J].

CAMLEY, RE ;

STAMPS, RL .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1993, 5 (23) :3727-3786

[7] PHASE-TRANSITIONS IN MAGNETIC SUPERLATTICES [J].

CAMLEY, RE ;

TILLEY, DR .

PHYSICAL REVIEW B, 1988, 37 (07) :3413-3421

[8] AMORPHOUS METALLIC FILMS FOR MAGNETO-OPTIC APPLICATIONS [J].

CHAUDHARI, P ;

CUOMO, JJ ;

GAMBINO, RJ .

APPLIED PHYSICS LETTERS, 1973, 22 (07) :337-339

[9] MAGNETIC-STRUCTURE OF AN AMORPHOUS RARE-EARTH TRANSITION-METAL ALLOY [J].

COEY, JMD ;

CHAPPERT, J ;

REBOUILLAT, JP ;

WANG, TS .

PHYSICAL REVIEW LETTERS, 1976, 36 (17) :1061-1064

[10] Oscillatory temperature dependence of exchange bias for Fe/Gd ferrimagnets [J].

Demirtas, S ;

Koymen, AR ;

Zeng, H .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2004, 16 (15) :L213-L220