Interfacial and surface magnetism in epitaxial NiCo2O4(001)/MgAl2O4 films

被引：8

作者：

Mellinger, Corbyn ^{[1
]}

Wang, Xiao ^{[2
]}

Subedi, Arjun ^{[1
]}

Clark, Andy T. ^{[2
]}

Komesu, Takashi ^{[1
]}

Rosenberg, Richard ^{[3
]}

Dowben, Peter A. ^{[1
,4
]}

Cheng, Xuemei ^{[2
]}

Xu, Xiaoshan ^{[1
,4
]}

机构：

[1] Univ Nebraska, Dept Phys & Astron, Lincoln, NE 68588 USA

[2] Bryn Mawr Coll, Dept Phys, Bryn Mawr, PA 19010 USA

[3] Argonne Natl Lab, Adv Photon Source, Lemont, IL 60439 USA

[4] Univ Nebraska, Nebraska Ctr Mat & Nanosci, Lincoln, NE 68588 USA

来源：

JOURNAL OF APPLIED PHYSICS | 2023年 / 133卷 / 19期

基金：

美国国家科学基金会;

关键词：

THIN-FILMS; INVERSE-PHOTOEMISSION; NICO2O4; ANISOTROPY; BEHAVIOR;

D O I：

10.1063/5.0152539

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

NiCo2O4 (NCO) films grown on MgAl2O4 (001) substrates have been studied using magnetometry and x-ray magnetic circular dichroism based on x-ray absorption spectroscopy and spin-polarized inverse photoemission spectroscopy with various thicknesses down to 1.6 nm. The magnetic behavior can be understood in terms of a layer of optimal NCO and an interfacial layer (1.2 +/- 0.1 nm), with a small canting of magnetization at the surface. The thickness dependence of the optimal layer can be described by the finite-scaling theory with a critical exponent consistent with the high perpendicular magnetic anisotropy. The interfacial layer couples antiferromagnetically to the optimal layer, generating exchange-spring styled magnetic hysteresis in the thinnest films. The non-optimal and measurement-speed-dependent magnetic properties of the interfacial layer suggest substantial interfacial diffusion.

引用

页数：7

共 36 条

[1] Origin of metallic behavior in NiCo2O4 ferrimagnet [J].

Bitla, Yugandhar ;

Chin, Yi-Ying ;

Lin, Jheng-Cyuan ;

Van, Chien Nguyen ;

Liu, Ruirui ;

Zhu, Yuanmin ;

Liu, Heng-Jui ;

Zhan, Qian ;

Lin, Hong-Ji ;

Chen, Chien-Te ;

Chu, Ying-Hao ;

He, Qing .

SCIENTIFIC REPORTS, 2015, 5

[2] Comparing inverse photoemission and X-ray absorption spectroscopies [J].

Borca, CN ;

Komesu, T ;

Dowben, PA .

JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 2002, 122 (03) :259-273

[3] Evidence for temperature dependent moments ordering in ferromagnetic NiMnSb(100) -: art. no. 052409 [J].

Borca, CN ;

Komesu, T ;

Jeong, HK ;

Dowben, PA ;

Ristoiu, D ;

Hordequin, C ;

Nozières, JP ;

Pierre, J ;

Stadler, S ;

Idzerda, YU .

PHYSICAL REVIEW B, 2001, 64 (05) :0524091-0524094

[4] Magnetic and electric "dead" layers in (La0.7Sr0.3)MnO3 thin films [J].

Borges, RP ;

Guichard, W ;

Lunney, JG ;

Coey, JMD ;

Ott, F .

JOURNAL OF APPLIED PHYSICS, 2001, 89 (07) :3868-3873

[5] Anomalous Hall effect and perpendicular magnetic anisotropy in ultrathin ferrimagnetic NiCo2O4 films [J].

Chen, Xuegang ;

Wu, Qiuchen ;

Zhang, Le ;

Hao, Yifei ;

Han, Myung-Geun ;

Zhu, Yimei ;

Hong, Xia .

APPLIED PHYSICS LETTERS, 2022, 120 (24)

[6] Magnetotransport Anomaly in Room-Temperature Ferrimagnetic NiCo2O4 Thin Films [J].

Chen, Xuegang ;

Zhang, Xiaozhe ;

Han, Myung-Geun ;

Zhang, Le ;

Zhu, Yimei ;

Xu, Xiaoshan ;

Hong, Xia .

ADVANCED MATERIALS, 2019, 31 (04)

[7] Spring magnet behavior in DyFe2/YFe2 Laves phases superlattices [J].

Dumesnil, K ;

Dutheil, M ;

Dufour, C ;

Mangin, P .

PHYSICAL REVIEW B, 2000, 62 (02) :1136-1140

[8] CRITICAL-BEHAVIOR OF THE 3-DIMENSIONAL ISING-MODEL - A HIGH-RESOLUTION MONTE-CARLO STUDY [J].

FERRENBERG, AM ;

LANDAU, DP .

PHYSICAL REVIEW B, 1991, 44 (10) :5081-5091

[9] SCALING THEORY FOR FINITE-SIZE EFFECTS IN CRITICAL REGION [J].

FISHER, ME ;

BARBER, MN .

PHYSICAL REVIEW LETTERS, 1972, 28 (23) :1516-&

[10] Preparation and characterization of epitaxial iron oxide films [J].

Gao, Y ;

Kim, YJ ;

Chambers, SA .

JOURNAL OF MATERIALS RESEARCH, 1998, 13 (07) :2003-2014

← 1 2 3 4 →