H-T phase diagram of rare-earth-transition-metal alloys in the vicinity of the compensation point

被引：24

作者：

Davydova, M. D. ^{[1
,2
]}

Zvezdin, K. A. ^{[1
,2
]}

Becker, J. ^{[3
]}

Kimel, A., V ^{[3
]}

Zvezdin, A. K. ^{[2
,4
]}

机构：

[1] Moscow Inst Phys & Technol, Dolgoprudnyi 141700, Russia

[2] Russian Acad Sci, Prokhorov Gen Phys Inst, Moscow 119991, Russia

[3] Radboud Univ Nijmegen, Inst Mol & Mat, NL-6525 AJ Nijmegen, Netherlands

[4] Russian Acad Sci, Lebedev Phys Inst, Moscow 119333, Russia

来源：

PHYSICAL REVIEW B | 2019年 / 100卷 / 06期

关键词：

PERPENDICULAR MAGNETIC-ANISOTROPY; ANOMALOUS HYSTERESIS LOOPS; GIANT MAGNETORESISTANCE; INTERMETALLIC COMPOUNDS; REVERSAL; FE;

D O I：

10.1103/PhysRevB.100.064409

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Anomalous hysteresis loops of ferrimagnetic amorphous alloys in high magnetic field in the vicinity of the compensation temperature have so far been explained by sample inhomogeneities. We obtain the H-T magnetic phase diagram for the ferrimagnetic GdFeCo alloy using a two-sublattice model in the paramagnetic rare-earth ion approximation and taking into account rare-earth (Gd) magnetic anisotropy. It is shown that if the magnetic anisotropy of the f sublattice is larger than that of the d sublattice, the tricritical point can be at higher temperature than the compensation point. The obtained phase diagram explains the observed anomalous hysteresis loops as a result of high-field magnetic phase transition, the order of which changes with temperature. It also implies that in the vicinity of the magnetic compensation point the shape of magnetic hysteresis loop strongly depends on temperature.

引用

页数：7

共 46 条

[11] Observation of an atomic exchange bias effect in DyCo4 film [J].

Chen, Kai ;

Lott, Dieter ;

Radu, Florin ;

Choueikani, Fadi ;

Otero, Edwige ;

Ohresser, Philippe .

SCIENTIFIC REPORTS, 2015, 5

[12] ANOMALOUS HYSTERESIS LOOPS IN SINGLE AND DOUBLE-LAYER SPUTTERED TBFE FILMS [J].

CHEN, T ;

MALMHALL, R .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1983, 35 (1-3) :269-271

[13] All-thermal switching of amorphous Gd-Fe alloys: Analysis of structural properties and magnetization dynamics [J].

Chimata, Raghuveer ;

Isaeva, Leyla ;

Kadas, Krisztina ;

Bergman, Anders ;

Sanyal, Biplab ;

Mentink, Johan H. ;

Katsnelson, Mikhail I. ;

Rasing, Theo ;

Kirilyuk, Andrei ;

Kimel, Alexey ;

Eriksson, Olle ;

Pereiro, Manuel .

PHYSICAL REVIEW B, 2015, 92 (09)

[14] Spin Transfer Torque Switching of Amorphous GdFeCo With Perpendicular Magnetic Anisotropy for Thermally Assisted Magnetic Memories [J].

Dai, Bing ;

Kato, Takeshi ;

Iwata, Satoshi ;

Tsunashima, Shigeru .

IEEE TRANSACTIONS ON MAGNETICS, 2012, 48 (11) :3223-3226

[15] Metamagnetism, giant magnetoresistance and magnetocaloric effects in RCO2-based compounds in the vicinity of the Curie temperature [J].

Duc, NH ;

Anh, DTK ;

Brommer, PE .

PHYSICA B-CONDENSED MATTER, 2002, 319 (1-4) :1-8

[16] ANOMALOUS MAGNETO-OPTICAL HYSTERESIS LOOPS OF SPUTTERED GD-CO FILMS [J].

ESHO, S .

JAPANESE JOURNAL OF APPLIED PHYSICS, 1976, 15 :93-98

[17]

Goransky B. F., 1969, PISMA ESKP TEOR FIZ, V10, p[196, 124]

[18]

Graves CE, 2013, NAT MATER, V12, P293, DOI [10.1038/NMAT3597, 10.1038/nmat3597]

[19] Fast magnetization reversal of GdFeCo induced by femtosecond laser pulses [J].

Hohlfeld, J ;

Gerrits, T ;

Bilderbeek, M ;

Rasing, T ;

Awano, H ;

Ohta, N .

PHYSICAL REVIEW B, 2002, 65 (01) :1-4

[20] Athermal all-optical femtosecond magnetization reversal in GdFeCo [J].

Hohlfeld, J. ;

Stanciu, C. D. ;

Rebei, A. .

APPLIED PHYSICS LETTERS, 2009, 94 (15)

← 1 2 3 4 5 →