Journal Article

PUBDB-2025-00300

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Giant Topological Hall Effect and Colossal Magnetoresistance in Heusler Ferromagnet near Room Temperature

Yanda, P. (Corresponding author)Extern*MPG* ; Noohinejad, L.DESY* ; Mao, N. ; Peshcherenko, N. ; Imasato, K. ; Srivastava, A. K. ; Guan, Y. ; Giri, B. ; Sharma, A. K.Extern* ; Manna, K.Extern* ; Parkin, S. S. P. ; Zhang, Y. ; Shekhar, C. ; Felser, C.Extern* ; yang, z.

2024
Wiley-VCH Weinheim

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Please use a persistent id in citations: doi:10.1002/adma.202411240  doi:10.3204/PUBDB-2025-00300

Abstract: Colossal magnetoresistance (CMR) is an exotic phenomenon that allows for the efficient magnetic control of electrical resistivity and has attracted significant attention in condensed matter due to its potential for memory and spintronic applications. Heusler alloys are the subject of considerable interest in this context due to the electronic properties that result from the nontrivial band topology. Here, the observation of CMR near room temperature is reported in the shape memory Heusler alloy Ni$_2$Mn$_{1.4}$In$_{0.6}$, which is attributed to the combined effects of magnetic field-induced martensite twin variant reorientation (MFIR) and magnetic field-induced structural phase transformation (MFIPT). This compound undergoes a structural phase transition from a cubic (austenite-L21) ferromagnetic (FM) to a monoclinic (martensite) antiferromagnetic (AFM), which leads to an effective increase in the size of the Fermi surface and consequently in CMR. Additionally, it exhibits significant anomalous Hall conductivity in both antiferromagnetic and ferromagnetic phases. Furthermore, it demonstrates a giant topological Hall resistivity (THR)≈6 µΩ.cm in the vicinity of martensite transition due to the enhanced spin chirality resulting from the formation of magnetic domains with Bloch-type domain walls. The findings contribute to the understanding of the magnetotransport of Ni-Mn-In Heusler alloys, which are prospective candidates for room-temperature spintronic applications.

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)
2. PETRA-D (FS-PETRA-D)

Research Program(s):

1. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)
2. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
3. DFG project G:(GEPRIS)390858490 - EXC 2147: Komplexität und Topologie in Quantenmaterialien (CT.QMAT) (390858490) (390858490)
4. ASPIN - Antiferromagntic spintronics (766566) (766566)
5. DFG project G:(GEPRIS)247310070 - SFB 1143: Korrelierter Magnetismus: Von Frustration zu Topologie (247310070) (247310070)
6. TOPMAT - Topological Materials: New Fermions, Realization of Single Crystals and their Physical Properties (742068) (742068)
7. DFG project G:(GEPRIS)449872909 - FOR 5249: Quantitative räumlich-zeitliche Modellierung von Materie mit elektronischen Korrelationen (449872909) (449872909)

Experiment(s):

1. PETRA Beamline P24 (PETRA III)

Appears in the scientific report 2024

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; DEAL Wiley ; Essential Science Indicators ; IF >= 25 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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