Magnetic properties of ultrathin tetragonal Heusler D022-Mn3Ge perpendicular-magnetized films

Sugihara, A.; Suzuki, K. Z.; Miyazaki, T.; Mizukami, S.
May 2015
Journal of Applied Physics;2015, Vol. 117 Issue 17, p17B511-1
Academic Journal
We investigated the crystal structure and magnetic properties of Manganese-germanium (Mn3Ge) films having the tetragonal D022 structure, with varied thicknesses (5-130 nm) prepared on chromium (Cr)-buffered single crystal MgO(001) substrates. A crystal lattice elongation in the in-plane direction, induced by the lattice mismatch between the D022-Mn3Ge and the Cr buffer layer, increased with decreasing thickness of the D022-Mn3Ge layer. The films exhibited clear magnetic hysteresis loops with a squareness ratio close to unity, and a step-like magnetization reversal even at a 5-nm thickness under an external field perpendicular to the film's plane. The uniaxial magnetic anisotropy constant of the films showed a reduction to less than 10 Merg/cm³ in the small thickness range (⩽20 nm), likely due to the crystal lattice elongation in the in-plane direction.


Related Articles

  • Investigations on magnetostatic interactions among CoFeB layers with perpendicular anisotropy in [Ta/CoFeB/MgO]N multilayers. Liang Hao; Jiangwei Cao; Mingfeng Liu; Honggang Dang; Tianli Jin; Ying Wang; Fulin Wei; Dan Wei // Journal of Applied Physics;2014, Vol. 115 Issue 17, p17C122-1 

    The magnetostatic interactions among CoFeB layers with perpendicular anisotropy are studied in [Ta/CoFeB/MgO]N multilayers by measured loops, magnetic domains, and a simple model. With increasing repeat number N or decreasing separation thickness d between adjacent CoFeB layers, higher...

  • Effect of interlayer interaction on domain structure of CoPt stacked films with perpendicular anisotropy. Kawamura, H.; Hayakawa, K.; Nomiya, N.; Sugita, R. // Journal of Applied Physics;2015, Vol. 117 Issue 17, p17B501-1 

    The effect of interlayer magnetostatic interaction on the domain structure of CoPt (3 nm)/Pt (δPt nm)/CoPt (10 nm) stacked films having perpendicular anisotropy is investigated. The domain structure of the demagnetized CoPt stacked films is observed using magnetic force microscope. The...

  • Influence of ion implantation parameters on the perpendicular magnetic anisotropy of Fe-N thin films with stripe domains. Amarouche, T.; Garnier, L.-C.; Marangolo, M.; Eddrief, M.; Etgens, V. H.; Fortuna, F.; Sadaoui, Y.; Tamine, M.; Cantin, J. L.; von Bardeleben, H. J. // Journal of Applied Physics;2017, Vol. 121 Issue 24, p1 

    Nitrogen-martensite thin films are known to present a perpendicular magnetic anisotropy (PMA) depending on the nitrogen content. Additionally, weak magnetic stripe domains have been studied in Fe-N samples made by ion implantation. In this work, ion implantation proves to be a good technique to...

  • Magnetization reversal in perpendicularly magnetized L10 FePd/FePt heterostructures. Ma, L.; Gilbert, D. A.; Neu, V.; Schäfer, R.; Zheng, J. G.; Yan, X. Q.; Shi, Z.; Kai Liu; Zhou, S. M. // Journal of Applied Physics;2014, Vol. 116 Issue 3, p033922-1 

    The magnetization reversal process is investigated in perpendicular spring magnets of epitaxial L10 FePd/FePt (24 nm) thin films with varying FePd thickness. For thin FePd layers, the reversal is initiated by the nucleation of reversed bubble domains and is then mainly accomplished by the...

  • Low damping magnetic properties and perpendicular magnetic anisotropy in the Heusler alloy Fe1.5CoGe. Conca, Andres; Niesen, Alessia; Reiss, Günter; Hillebrands, Burkard // AIP Advances;Aug2019, Vol. 9 Issue 8, pN.PAG 

    We present a study of the dynamic magnetic properties of TiN-buffered epitaxial thin films of the Heusler alloy Fe1.5CoGe. Thickness series annealed at different temperatures are prepared and the magnetic damping is measured, a lowest value of α = 2.18 × 10−3 is obtained. The...

  • Sputtering perpendicular magnetic anisotropy CoPt thin film on glass substrate at room temperature. Chuan-Fa Huang; An-Cheng Sun; Hsian-Yuan Wu; Fe-Te Yuan; Jen-Hwa Hsu // Journal of Applied Physics;2014, Vol. 115 Issue 17, p17C118-1 

    [Co1.0/Pt0.75]n multilayers consisting of 1.0-nm-thick Co and 0.75-nm-thick Pt layers with n=2-6 were grown on glass substrates with and without a Pt underlayer at room temperature (RT). In this study, the effects of total thickness and Pt underlayer on magnetic properties and microstructures...

  • Interfacial perpendicular magnetic anisotropy in CoFeB/MgO structure with various underlayers. Young-Wan Oh; Kyeong-Dong Lee; Jong-Ryul Jeong; Byong-Guk Park // Journal of Applied Physics;2014, Vol. 115 Issue 17, p17C724-1 

    Interfacial perpendicular magnetic anisotropy (PMA) in CoFeB/MgO structures was investigated and found to be critically relied on underlayer material and annealing temperature. With Ta or Hf underlayer, clear PMA is observed in as-deposited samples while no PMA was shown in those with Pt or Pd....

  • Spin-Dependent Electronic Transport in IrMn–Co/Pd Multilayered Systems. Wu, W.-B.; Kasiuk, J.; Fedotova, J.; Nguyen, T. N. Anh; Trinh, T. H. Thuy; Do, K. Tung; Vu, D. Lam; Przewoźnik, J.; Kapusta, C.; Kupreeva, O. // International Journal of Nanoscience;Jun-Aug2019, Vol. 18 Issue 3/4, pN.PAG 

    Relation between magnetoresistance and magnetization reversal in thin multilayered IrMn–Co/Pd films deposited both on planar and nanoporous substrates is in focus of the present work. Magnetic anisotropy, exchange coupling and mechanisms of magnetic resistivity are discussed.

  • Magnetic and structural properties of L10-Mn50Ga50-xAlx epitaxially grown thin films. Kamiya, Keisuke; Zhao, Siqian; Tanaka, Yoshitomo; Mankey, Gary; Suzuki, Takao // AIP Advances;Mar2019, Vol. 9 Issue 3, pN.PAG 

    Epitaxially grown L10- MnGa(Al) continuous thin films with the c-axis along the film normal are successfully fabricated on MgO (001) substrates at a substrate deposition temperature Ts of around 400 °C. The order parameter S is found to decrease with Al content, except for that for Al = 0....


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics